Delete galleries by URL/Slug not working

[pyrorain]

I've treid to delete dead links by using this option, but it always tells me thre are 0 deletes, after entering the URls.

[admin]

Can you find those URLs in list thumbs?

[pyrorain]

yep, in fact that's how I have been deleting them, seraching one by one in the list thumbs

[admin]

Ok, send me admin area plz and an example url.