The operation can't be completed because ".Trash" needs to be downloaded

Hey Dan68 - thanks for posting on our Community and sorry to hear about this.

Can you please send us a screenshot of the exact error you're getting so that we can have a visual too?

In the meantime, you should be able to delete your files through the website directly.

Let us know of any updates, Daniel!

I guess I am supposed to upload a screenshot using the "Attachment" (paper clip) button? Unfortunately, nothing happens when I click the button.

Anyway, the dialog contains exaclty the phrase of the subject line (it's a quote).

Could you maybe try copying and pasting it inside your reply box instead then Dan68? 

Walter, thanks for the quick reply. Here is the screenshot:

Hi Dan68, could you try deleting the cache folder on your device?

Additionally, have you enabled the viewing of hidden files on your machine? There are some guides on the internet on how to enable this feature on Mac OS.