Array to string conversion error

[shaneonabike]

Describe the bug
When saving Caldera forms there is quite a few notices relating to the following:

PHP Notice: Array to string conversion in /wp-content/plugins/cf-civicrm/includes/class-civicrm-caldera-forms-forms.php on line 317

To Reproduce
Steps to reproduce the behavior:

1. Setup a form
2. Add a CiviCRM Contact 1, Contact 2, Relationship, and two Address processors
3. Save the form
4. See error

Expected behavior
I looked into it a bit more and it's a result of your call of A clear and concise description of what you expected to happen.

array_diff_assoc( $form['processors'], $contacts )

Apparently, when you have multidimensional arrays and perform a diff this issue will happen as a result, because it is not capable of performing the operation.