TypeError: Drupal\ckeditor5_premium_features\Plugin\Filter\FilterCollaboration::processWithTrackChangesData(): Argument #2 ($trackChangesData) must be of type array, null given

Hi @mcortesd19

Thank you for reporting the issue - we're looking into it.

Hi Marvin

Thank you for reporting the issue. The fix is working fine.
When testing I immediatelty spotted another issue - when there is an insertion or deletion suggestion in the node, there is a Warning: Trying to access array offset on null in Drupal\ckeditor5_premium_features\Plugin\Filter\FilterCollaboration->processAttributeSuggestions() on node form submit.
I've added a fix here in issue's branch.

Hi Salmonek,

Yes, you are right, and the patch is working as expected!

+1 to RTBC, had the same problem and MR also resolves it for me.