EmailValidator not found

[Rhodderz]

I have a brand clean new installation of Drupal8 on Centos 7 running with php7 and apache (it complained 5.6 was being deprecated this month)
Installation of the cloudflare modules (as based on the https://www.drupal.org/project/cloudflare page).
Problem is when i go to the settings page im given "The website encountered an unexpected error. Please try again later." and the below error in the error_log.

I am new to Drupal, installing the module to get familiar with it and help a friend. From what i can see EmailValidator is installed.

I can dump my composer show if this helps.

Error: Class 'Drupal\\Component\\Utility\\EmailValidator' not found in /var/www/html/drupal/modules/cloudflare/src/Form/SettingsForm.php on line 92 #0 /var/www/html/drupal/core/lib/Drupal/Core/DependencyInjection/ClassResolver.php(28): Drupal\\cloudflare\\Form\\SettingsForm::create(Object(Drupal\\Core\\DependencyInjection\\Container))\n#1 /var/www/html/drupal/modules/ctools/src/Wizard/FormWizardBase.php(238): Drupal\\Core\\DependencyInjection\\ClassResolver->getInstanceFromDefinition('Drupal\\\\cloudfla...')\n#2 /var/www/html/drupal/core/lib/Drupal/Core/Form/FormBuilder.php(202): Drupal\\ctools\\Wizard\\FormWizardBase->getFormId()\n#3 /var/www/html/drupal/core/lib/Drupal/Core/Form/FormBuilder.php(224): Drupal\\Core\\Form\\FormBuilder->getFormId(Object(Drupal\\cloudflare\\Wizard\\ConfigWizard), Object(Drupal\\Core\\Form\\FormState))\n#4 /var/www/html/drupal/modules/ctools/src/Wizard/WizardFactory.php(54): Drupal\\Core\\Form\\FormBuilder->buildForm(Object(Drupal\\cloudflare\\Wizard\\ConfigWizard), Object(Drupal\\Core\\Form\\FormState))\n#5 /var/www/html/drupal/modules/ctools/src/Controller/WizardFormController.php(78): Drupal\\ctools\\Wizard\\WizardFactory->getWizardForm(Object(Drupal\\cloudflare\\Wizard\\ConfigWizard), Array, false)\n#6 [internal function]: Drupal\\ctools\\Controller\\WizardFormController->getContentResult(Object(Symfony\\Component\\HttpFoundation\\Request), Object(Drupal\\Core\\Routing\\RouteMatch))\n#7 /var/www/html/drupal/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array)\n#8 /var/www/html/drupal/core/lib/Drupal/Core/Render/Renderer.php(582): Drupal\\Core\\EventSubscriber\\EarlyRenderingControllerWrapperSubscriber->Drupal\\Core\\EventSubscriber\\{closure}()\n#9 /var/www/html/drupal/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\\Core\\Render\\Renderer->executeInRenderContext(Object(Drupal\\Core\\Render\\RenderContext), Object(Closure))\n#10 /var/www/html/drupal/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\\Core\\EventSubscriber\\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array)\n#11 /var/www/html/drupal/vendor/symfony/http-kernel/HttpKernel.php(151): Drupal\\Core\\EventSubscriber\\EarlyRenderingControllerWrapperSubscriber->Drupal\\Core\\EventSubscriber\\{closure}()\n#12 /var/www/html/drupal/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\\Component\\HttpKernel\\HttpKernel->handleRaw(Object(Symfony\\Component\\HttpFoundation\\Request), 1)\n#13 /var/www/html/drupal/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\\Component\\HttpKernel\\HttpKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#14 /var/www/html/drupal/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\\Core\\StackMiddleware\\Session->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#15 /var/www/html/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\\Core\\StackMiddleware\\KernelPreHandle->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#16 /var/www/html/drupal/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\\page_cache\\StackMiddleware\\PageCache->pass(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#17 /var/www/html/drupal/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\\page_cache\\StackMiddleware\\PageCache->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#18 /var/www/html/drupal/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(52): Drupal\\Core\\StackMiddleware\\ReverseProxyMiddleware->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#19 /var/www/html/drupal/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\\Core\\StackMiddleware\\NegotiationMiddleware->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#20 /var/www/html/drupal/core/lib/Drupal/Core/DrupalKernel.php(693): Stack\\StackedHttpKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#21 /var/www/html/drupal/index.php(19): Drupal\\Core\\DrupalKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request))\n#22 {main}, referer: