Multiple Registration Fire Ajax Error When Attempting To Remove Pictures
While this is a module error, we'll need to dedicate time to it as being able to be accurately represented is a serious concern for our userbase.
Fixed the following line of code:
multiple_registration.module line 215
$paragraphs_with_removed_mode = (!isset($form_state->getTriggeringElement()['#paragraphs_mode']) && ($form_state->getTriggeringElement()['#paragraphs_mode'] !== 'removed'));
should be using isset instead of !isset. The way it existed actually ensured that this error would arise by only checking the contents of #paragraphs_mode if it didn't exist.
--DEV NOTE CONT.--
Turns out there were some major issues in general with Multiple Registration. We've rolled it back to a stable version.