TypeError: count(): Argument #1 ($value) must be of type Countable|array, bool given in count() (line 1535 of /docroot/modules/filter/filter.module

Can you check this issue, if it will fix the problem? 🐛 [D7] preg_split in _filter_url breaks for long html tags Needs work

@poker10, that's definitely related - Thanks for sharing and your contributions towards the resolution.
I found this module: https://www.drupal.org/project/ckeditor_blockimagepaste → , which is for Drupal 9/10 and not 7, but I will replicate the logic.