Fix (Forbidden) Failed to load resource: when a user role has permission to use media, but only edit own media created ones

Confirming this issue.

I agree that Option 1 would be the best UX, but Option 2 would be acceptable if implementation of Option 1 is overly difficult.

The MR throws an error if the response is other than 'ok' and adds a .catch() to alert the user. Static patch attached.

I tried to use ckeditor's Notification plugin, but doesn't seem like it was included Drupal's build of the editor. If this comment is correct, Notification doesn't provide any special UI and falls back to window.alert() itself.

WOW, that was quick
Thanks, Michael, for the MR and static patch.
Testing ....