TypeError: method_exists(): Argument #1 ($object_or_class) must be of type object|string, null given in method_exists()

Patch created in #2, Resolving issue and works as expected, Needs more eyes to view on that, Moving to Needs Reviews.

Hi @kushagragoyal

Thank you for reporting the issue and providing patch.
We are currently a little busy with new functionalities and bugs related to updated CKEditor in upcoming Drupal 10.1
We'll check the problem and patch at some time.

Looks good.

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