404 Not Found Error when running reports
Most common reason I have run into a 404 error when I've moved accounts? File permission issues. Usually there are some files that are attached to the wrong user/group, typically. Your host should be able to look at the logs for you and pinpoint the file(s), directory(ies), etc where the permission errors are happening. I like it if I can get into a chat with them, as I can then run the process, generate the error, and they can see it in the logs.