I can no longer upload files

#1

Octoprint 1.3.10

I just finished a print and deleted the file (file list is empty). I selecte upload file and try to upload anything and it tells me upload fails. Even if I try to upload the exact file I just printed. No good. I can create a folder but I cannot upload anything. What could be the issue? It shows 30GB free.

#2

What do the logs say?