I'm using Sitefinity 5.1 and I'm trying to upload a new file to a library. When I go to the page to upload the file, select the library and click "Upload and Publish", I get a "return code 0". I've checked the Sitefinity and Windows server logs and see absolutely nothing to help me with this error. I also get this same error when I try to update an existing file.
I've checked the database size and server hard drive space and there is still gigs of space available (I'm only uploading a 200kb file).
How else can I troubleshoot this?