Can't delte attachments

[Quillback]

I go to my profile, click on the drop down menu, then select "My attachments".

My attachments come up in a list and there are 300+ of them, all images.  I click on the title of an attachment, get a window showing the image, select File-delete, but they don't delete - it just hangs and says "loading".

I would really like to delete the images.