Unclear validation errors when upgrading text formats to CKEditor 5

Adding this issue, because I have patch #15 applied, and the file that is patched is the place where validation occurs.

I had to disable the filter provided by Noopener Filter → , then I could save the text formats.

However, the only reason I could figure out the source of the problem was to set a breakpoint on this line (718) in CKEditor5.php

$form_state->getCompleteFormState()->setErrorByName($form_item_name, $violation->getMessage());

It'd be really helpful if the form item actually was highlighted in red or focused or something.

Please provide the exported config for the original text format + CKEditor 4 configuration.

Root cause found: #3384641-4: Filter plugin type is wrong, which causes CKEditor 5 to complain → . This is a bug in that contrib module. 😊

Automatically closed - issue fixed for 2 weeks with no activity.

I do not have Noopener Filter module on my drupal instance 9.5.11 but still am getting same issue while saving the text format ckeditor 5