diff --git a/src/Module/Slider.php b/src/Module/Slider.php
index 368f159..fc4fa67 100644
--- a/src/Module/Slider.php
+++ b/src/Module/Slider.php
@@ -184,10 +184,10 @@ protected function compile()
 					'uuid'      => isset($files->uuid) ? $files->uuid : null,
 					'name'      => $file->basename,
 					'singleSRC' => $files->path,
-					'alt'       => $arrMeta['alt'],
-					'title'     => $arrMeta['title'],
-					'imageUrl'  => $arrMeta['link'],
-					'caption'   => $arrMeta['caption'],
+					'alt'       => $arrMeta['alt'] ?? null,
+					'title'     => $arrMeta['title'] ?? null,
+					'imageUrl'  => $arrMeta['link'] ?? null,
+					'caption'   => $arrMeta['caption'] ?? null,
 					'fullsize'  => $this->fullsize,
 				);
 
@@ -447,10 +447,10 @@ protected function parseSlides($objSlides)
 					'id' => $file->id,
 					'name' => $fileObject->basename,
 					'singleSRC' => $file->path,
-					'alt' => $meta['alt'],
-					'title' => $meta['title'],
-					'imageUrl' => $meta['link'],
-					'caption' => $meta['caption'],
+					'alt' => $meta['alt'] ?? null,
+					'title' => $meta['title'] ?? null,
+					'imageUrl' => $meta['link'] ?? null,
+					'caption' => $meta['caption'] ?? null,
 					'size' => isset($this->imgSize) ? $this->imgSize : $this->size,
 					'fullsize' => $this->fullsize,
 				), null, substr(md5('mod_rocksolid_slider_' . $this->id), 0, 6), $file);
@@ -515,11 +515,11 @@ protected function parseSlides($objSlides)
 					'id' => $file->id,
 					'name' => $fileObject->basename,
 					'singleSRC' => $file->path,
-					'alt' => $meta['alt'],
-					'title' => $meta['title'],
-					'imageUrl' => $meta['link'],
-					'caption' => $meta['caption'],
-					'size' => $slide['backgroundImageSize'],
+					'alt' => $meta['alt'] ?? null,
+					'title' => $meta['title'] ?? null,
+					'imageUrl' => $meta['link'] ?? null,
+					'caption' => $meta['caption'] ?? null,
+					'size' => $slide['backgroundImageSize'] ?? null,
 				));
 			}
 			else {
diff --git a/src/Resources/contao/dca/tl_content.php b/src/Resources/contao/dca/tl_content.php
index c1ba260..0db1d1e 100644
--- a/src/Resources/contao/dca/tl_content.php
+++ b/src/Resources/contao/dca/tl_content.php
@@ -114,9 +114,10 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'x' => $GLOBALS['TL_LANG']['tl_module']['rsts_direction_x'],
-		'y' => $GLOBALS['TL_LANG']['tl_module']['rsts_direction_y'],
+		'x',
+		'y',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_direction_options'],
 	'eval' => array('tl_class' => 'w50'),
 	'sql' => "varchar(64) NOT NULL default ''",
 );
@@ -269,12 +270,13 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'bullets' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_bullets'],
-		'numbers' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_numbers'],
-		'tabs' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_tabs'],
-		'thumbs' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_thumbs'],
-		'none' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_none'],
+		'bullets',
+		'numbers',
+		'tabs',
+		'thumbs',
+		'none',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options'],
 	'eval' => array('tl_class' => 'w50'),
 	'sql' => "varchar(64) NOT NULL default ''",
 );
@@ -309,11 +311,12 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'fit' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_fit'],
-		'crop' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_crop'],
-		'scale' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_scale'],
-		'none' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_none'],
+		'fit',
+		'crop',
+		'scale',
+		'none',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options'],
 	'eval' => array('tl_class' => 'w50 clr'),
 	'sql' => "varchar(64) NOT NULL default ''",
 );
@@ -401,11 +404,12 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'fit' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_fit'],
-		'crop' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_crop'],
-		'scale' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_scale'],
-		'none' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_none'],
+		'fit',
+		'crop',
+		'scale',
+		'none',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options'],
 	'eval' => array(
 		'tl_class' => 'w50 clr',
 		'includeBlankOption' => true,
diff --git a/src/Resources/contao/dca/tl_module.php b/src/Resources/contao/dca/tl_module.php
index f273072..2dc582e 100644
--- a/src/Resources/contao/dca/tl_module.php
+++ b/src/Resources/contao/dca/tl_module.php
@@ -116,9 +116,10 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'x' => $GLOBALS['TL_LANG']['tl_module']['rsts_direction_x'],
-		'y' => $GLOBALS['TL_LANG']['tl_module']['rsts_direction_y'],
+		'x',
+		'y',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_direction_options'],
 	'eval' => array('tl_class' => 'w50'),
 	'sql' => "varchar(64) NOT NULL default ''",
 );
@@ -271,12 +272,13 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'bullets' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_bullets'],
-		'numbers' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_numbers'],
-		'tabs' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_tabs'],
-		'thumbs' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_thumbs'],
-		'none' => $GLOBALS['TL_LANG']['tl_module']['rsts_navType_none'],
+		'bullets',
+		'numbers',
+		'tabs',
+		'thumbs',
+		'none',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options'],
 	'eval' => array('tl_class' => 'w50'),
 	'sql' => "varchar(64) NOT NULL default ''",
 );
@@ -311,11 +313,12 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'fit' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_fit'],
-		'crop' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_crop'],
-		'scale' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_scale'],
-		'none' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_none'],
+		'fit',
+		'crop',
+		'scale',
+		'none',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options'],
 	'eval' => array('tl_class' => 'w50 clr'),
 	'sql' => "varchar(64) NOT NULL default ''",
 );
@@ -403,11 +406,12 @@
 	'exclude' => true,
 	'inputType' => 'select',
 	'options' => array(
-		'fit' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_fit'],
-		'crop' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_crop'],
-		'scale' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_scale'],
-		'none' => $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_none'],
+		'fit',
+		'crop',
+		'scale',
+		'none',
 	),
+	'reference' => &$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options'],
 	'eval' => array(
 		'tl_class' => 'w50 clr',
 		'includeBlankOption' => true,
diff --git a/src/Resources/contao/dca/tl_rocksolid_slide.php b/src/Resources/contao/dca/tl_rocksolid_slide.php
index b7c2d25..2c5d78c 100644
--- a/src/Resources/contao/dca/tl_rocksolid_slide.php
+++ b/src/Resources/contao/dca/tl_rocksolid_slide.php
@@ -76,7 +76,7 @@
 				'label' => &$GLOBALS['TL_LANG']['tl_rocksolid_slide']['delete'],
 				'href' => 'act=delete',
 				'icon' => 'delete.gif',
-				'attributes' => 'onclick="if(!confirm(\'' . $GLOBALS['TL_LANG']['MSC']['deleteConfirm'] . '\'))return false;Backend.getScrollOffset()"',
+				'attributes' => 'onclick="if(!confirm(\'' . ($GLOBALS['TL_LANG']['MSC']['deleteConfirm'] ?? '') . '\'))return false;Backend.getScrollOffset()"',
 			),
 			'toggle' => array(
 				'label' => &$GLOBALS['TL_LANG']['tl_rocksolid_slide']['toggle'],
diff --git a/src/Resources/contao/dca/tl_rocksolid_slider.php b/src/Resources/contao/dca/tl_rocksolid_slider.php
index 176ce6c..a4ab8bd 100644
--- a/src/Resources/contao/dca/tl_rocksolid_slider.php
+++ b/src/Resources/contao/dca/tl_rocksolid_slider.php
@@ -73,7 +73,7 @@
 				'label' => &$GLOBALS['TL_LANG']['tl_rocksolid_slider']['delete'],
 				'href' => 'act=delete',
 				'icon' => 'delete.gif',
-				'attributes' => 'onclick="if(!confirm(\'' . $GLOBALS['TL_LANG']['MSC']['deleteConfirm'] . '\'))return false;Backend.getScrollOffset()"',
+				'attributes' => 'onclick="if(!confirm(\'' . ($GLOBALS['TL_LANG']['MSC']['deleteConfirm'] ?? '') . '\'))return false;Backend.getScrollOffset()"',
 			),
 			'show' => array(
 				'label' => &$GLOBALS['TL_LANG']['tl_rocksolid_slider']['show'],
diff --git a/src/Resources/contao/languages/de/tl_module.php b/src/Resources/contao/languages/de/tl_module.php
index 91d498c..2f90e10 100644
--- a/src/Resources/contao/languages/de/tl_module.php
+++ b/src/Resources/contao/languages/de/tl_module.php
@@ -36,8 +36,8 @@
 $GLOBALS['TL_LANG']['tl_module']['rsts_type'][1] = 'Bei "slide" bewegen sich die Elemente horizontal oder vertikal. Bei "fade" werden die Elemente überblendet.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_direction'][0] = 'Ausrichtung';
 $GLOBALS['TL_LANG']['tl_module']['rsts_direction'][1] = 'Ausrichtung der Slide-Bewegung (nur für Animationstyp "slide").';
-$GLOBALS['TL_LANG']['tl_module']['rsts_direction_x'] = 'Horizontal';
-$GLOBALS['TL_LANG']['tl_module']['rsts_direction_y'] = 'Vertikal';
+$GLOBALS['TL_LANG']['tl_module']['rsts_direction_options']['x'] = 'Horizontal';
+$GLOBALS['TL_LANG']['tl_module']['rsts_direction_options']['y'] = 'Vertikal';
 $GLOBALS['TL_LANG']['tl_module']['rsts_random'][0] = 'Zufällige Sortierung';
 $GLOBALS['TL_LANG']['tl_module']['rsts_random'][1] = 'Wenn aktiviert werden die einzelnen Slides beim Start zufällig sortiert.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_loop'][0] = 'Endlosschleife';
@@ -78,11 +78,11 @@
 $GLOBALS['TL_LANG']['tl_module']['rsts_pauseAutoplayOnHover'][1] = 'Autoplay pausieren sobald man die Maus über den Slider bewegt.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_navType'][0] = 'Navigationstyp';
 $GLOBALS['TL_LANG']['tl_module']['rsts_navType'][1] = 'Wählen Sie den gewünschten Navigations-Typ.';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_bullets'] = 'Punkte';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_numbers'] = 'Nummeriert';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_tabs'] = 'Tabs';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_thumbs'] = 'Thumbnails';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_none'] = 'Navigation ausblenden';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['bullets'] = 'Punkte';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['numbers'] = 'Nummeriert';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['tabs'] = 'Tabs';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['thumbs'] = 'Thumbnails';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['none'] = 'Navigation ausblenden';
 $GLOBALS['TL_LANG']['tl_module']['rsts_controls'][0] = 'Weiter und Zurück anzeigen';
 $GLOBALS['TL_LANG']['tl_module']['rsts_controls'][1] = 'Aktiviert die Navigationspfeile.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_thumbControls'][0] = 'Thumbnails in Weiter und Zurück anzeigen';
@@ -93,10 +93,10 @@
 $GLOBALS['TL_LANG']['tl_module']['rsts_thumbs'][1] = 'Aktiviert die Einstellungen der Thumbnails-Navigation.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode'][0] = 'Skalierungsmodus';
 $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode'][1] = 'Achtung: Hat keine Auswirkung wenn Höhe oder Breite auf "auto" gesetzt ist.';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_fit'] = 'Proportional';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_crop'] = 'Beschneiden';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_scale'] = 'Verzerren';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_none'] = 'Nicht skalieren';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['fit'] = 'Proportional';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['crop'] = 'Beschneiden';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['scale'] = 'Verzerren';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['none'] = 'Nicht skalieren';
 $GLOBALS['TL_LANG']['tl_module']['rsts_imagePosition'][0] = 'Bildpositionierung';
 $GLOBALS['TL_LANG']['tl_module']['rsts_imagePosition'][1] = 'Position der Bilder und Hintergrundbilder.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_imagePositions']['center'] = 'Zentriert';
diff --git a/src/Resources/contao/languages/en/tl_module.php b/src/Resources/contao/languages/en/tl_module.php
index 59cf9f4..738db61 100644
--- a/src/Resources/contao/languages/en/tl_module.php
+++ b/src/Resources/contao/languages/en/tl_module.php
@@ -36,8 +36,8 @@
 $GLOBALS['TL_LANG']['tl_module']['rsts_type'][1] = '"Slide" moves the elements vertically and horizontally. "Fade" uses a change-over effect.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_direction'][0] = 'Direction';
 $GLOBALS['TL_LANG']['tl_module']['rsts_direction'][1] = 'Direction of the slide animation (only for animation type "slide").';
-$GLOBALS['TL_LANG']['tl_module']['rsts_direction_x'] = 'Horizontal';
-$GLOBALS['TL_LANG']['tl_module']['rsts_direction_y'] = 'Vertical';
+$GLOBALS['TL_LANG']['tl_module']['rsts_direction_options']['x'] = 'Horizontal';
+$GLOBALS['TL_LANG']['tl_module']['rsts_direction_options']['y'] = 'Vertical';
 $GLOBALS['TL_LANG']['tl_module']['rsts_random'][0] = 'Randomize elements';
 $GLOBALS['TL_LANG']['tl_module']['rsts_random'][1] = 'If activated slider elements are randomized at the start.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_loop'][0] = 'Loop';
@@ -78,11 +78,11 @@
 $GLOBALS['TL_LANG']['tl_module']['rsts_pauseAutoplayOnHover'][1] = 'Pauses the autoplay if the mouse is placed over the slider.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_navType'][0] = 'Navigation type';
 $GLOBALS['TL_LANG']['tl_module']['rsts_navType'][1] = 'Choose the navigation type.';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_bullets'] = 'Bullets';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_numbers'] = 'Numbers';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_tabs'] = 'Tabs';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_thumbs'] = 'Thumbnails';
-$GLOBALS['TL_LANG']['tl_module']['rsts_navType_none'] = 'Hide navigation';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['bullets'] = 'Bullets';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['numbers'] = 'Numbers';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['tabs'] = 'Tabs';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['thumbs'] = 'Thumbnails';
+$GLOBALS['TL_LANG']['tl_module']['rsts_navType_options']['none'] = 'Hide navigation';
 $GLOBALS['TL_LANG']['tl_module']['rsts_controls'][0] = 'Show next and previous arrows';
 $GLOBALS['TL_LANG']['tl_module']['rsts_controls'][1] = 'Activates the next and previous controls.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_thumbControls'][0] = 'Show thumbnails in next and previous arrows';
@@ -93,10 +93,10 @@
 $GLOBALS['TL_LANG']['tl_module']['rsts_thumbs'][1] = 'Activate the settings for the thumbnail navigation.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode'][0] = 'Scale mode';
 $GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode'][1] = 'Note: Has no effect if either width or height are set to "auto".';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_fit'] = 'Proportional';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_crop'] = 'Cut';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_scale'] = 'Distort';
-$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_none'] = 'None';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['fit'] = 'Proportional';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['crop'] = 'Cut';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['scale'] = 'Distort';
+$GLOBALS['TL_LANG']['tl_module']['rsts_scaleMode_options']['none'] = 'None';
 $GLOBALS['TL_LANG']['tl_module']['rsts_imagePosition'][0] = 'Image positioning';
 $GLOBALS['TL_LANG']['tl_module']['rsts_imagePosition'][1] = 'Position of images and background images.';
 $GLOBALS['TL_LANG']['tl_module']['rsts_imagePositions']['center'] = 'Centered';
diff --git a/src/Resources/contao/templates/rsts_default.html5 b/src/Resources/contao/templates/rsts_default.html5
index e5c3ba0..7b5e9e6 100644
--- a/src/Resources/contao/templates/rsts_default.html5
+++ b/src/Resources/contao/templates/rsts_default.html5
@@ -19,12 +19,12 @@
 		?>
 
 		<?php if ($loadLazy): ?>
-			<script type="text/html"<?php if ($image->linkTitle || $image->picture['alt']): ?> data-rsts-name="<?= $image->linkTitle ?: $image->picture['alt'] ?>"<?php endif ?><?php if (!empty($image->thumb->src)): ?> data-rsts-thumb="<?= $image->thumb->src ?>"<?php endif ?>>
+			<script type="text/html"<?php if (!empty($image->linkTitle) || !empty($image->picture['alt'])): ?> data-rsts-name="<?= ($image->linkTitle ?? null) ?: $image->picture['alt'] ?>"<?php endif ?><?php if (!empty($image->thumb->src)): ?> data-rsts-thumb="<?= $image->thumb->src ?>"<?php endif ?>>
 			<?php ob_start() ?>
 		<?php endif ?>
 
-		<?php if (strpos($image->attributes, 'data-lightbox') !== false) {
-			$lightboxUrls[] = array($image->href, $image->linkTitle ?: $image->picture['alt']);
+		<?php if (strpos($image->attributes ?? '', 'data-lightbox') !== false) {
+			$lightboxUrls[] = array($image->href, ($image->linkTitle ?? null) ?: ($image->picture['alt'] ?? null));
 		} ?>
 
 		<?php
@@ -32,15 +32,15 @@
 			$attributes = array(
 				'data-rsts-type="image"',
 			);
-			if ($image->href) {
+			if (!empty($image->href)) {
 				$tagName = 'a';
 			}
-			if ($image->href || $image->linkTitle) {
-				$attributes[] = 'title="' . ($image->linkTitle ?: $image->picture['alt']) . '"';
+			if (!empty($image->href) || !empty($image->linkTitle)) {
+				$attributes[] = 'title="' . (($image->linkTitle ?? null) ?: ($image->picture['alt'] ?? '')) . '"';
 			}
-			if ($image->href) {
+			if (!empty($image->href)) {
 				$attributes[] = 'href="' . $image->href . '"';
-				$attributes[] = $image->attributes;
+				$attributes[] = $image->attributes ?? '';
 			}
 			if (!empty($this->rsts_invertControls)) {
 				$attributes[] = 'data-rsts-class="' . (empty($this->options['cssPrefix']) ? 'rsts-' : $this->options['cssPrefix']) . 'invert-controls"';
@@ -148,7 +148,7 @@
 		<?php if (! empty($slide['videoURL'])): ?>
 
 			<<?= $tagName ?> data-rsts-type="video" data-rsts-video="<?= $slide['videoURL'] ?>" <?= $attributes ?>>
-				<?php $this->insert('picture_default', array_merge($slide['image']->picture, ['attributes' => $slide['image']->picture['attributes'] . ' ' . $imageAttributes])) ?>
+				<?php $this->insert('picture_default', array_merge($slide['image']->picture, ['attributes' => ($slide['image']->picture['attributes'] ?? '') . ' ' . $imageAttributes])) ?>
 
 		<?php elseif (!empty($slide['videos'])): ?>
 			<<?= $tagName ?> data-rsts-type="video" <?= $attributes ?>>
@@ -166,8 +166,8 @@
 				if ($slide['image']->linkTitle) {
 					$attributes .= ' title="' . $slide['image']->linkTitle . '"';
 				}
-				$attributes .= ' '.$slide['image']->attributes;
-				if (strpos($slide['image']->attributes, 'data-lightbox') !== false) {
+				$attributes .= ' '.($slide['image']->attributes ?? '');
+				if (strpos($slide['image']->attributes ?? '', 'data-lightbox') !== false) {
 					$lightboxUrls[] = array($slide['image']->href, $slide['title']);
 				}
 			} ?>
@@ -196,7 +196,7 @@
 				<?php endforeach ?>
 			</video>
 		<?php elseif (!empty($slide['backgroundImage'])): ?>
-			<?php $this->insert('picture_default', array_merge($slide['backgroundImage']->picture, ['attributes' => $slide['backgroundImage']->picture['attributes'] . ' ' . $backgroundAttributes])) ?>
+			<?php $this->insert('picture_default', array_merge($slide['backgroundImage']->picture, ['attributes' => ($slide['backgroundImage']->picture['attributes'] ?? '') . ' ' . $backgroundAttributes])) ?>
 		<?php endif ?>
 
 		</<?= $tagName ?>>