Problem with editing items all at once

Hi OMEKA Forum,
I have a Problem with editing several items all at once after selecting them by pressing the button ‘select all results’. Take a look at the Screenshots. After that the message ‘The items are checked and deleted one by one in the background. Check logs for success and errors.’ appears, but nothing happens at all. I have the same problem, when selecting just very few or many items.

I hope you can help me.

kind regards