Can't delete incomplete images and can't write to VHD

It seems like they were working before, judging by how one of them was only 9-ish days ago; did something change for WENSVR_04 9 days ago, and did something happen to WensvrEHR about a month ago?

Not that I’m aware of. I’ll try your other suggestions before I investigate this avenue further.

Two things I would suggest, is:

Manually run the cleanup script on your server.
Manually run the remove_unknown script on your server.
Also, is your drive space possibly full?

The repository (Synology NAS) did indeed fill up a while back, within the past couple weeks. I just started the “cleanup 0%” command and I noticed this:

Is it OK to manually remove that file? Or should I do something else instead?

After this I will also run the remove_unknown.bat script.