I attempted to access my websites and the maintenance site today and both are missing. the websites are black screens and the maintenance address comes up as not found. I was sure that I had accessed these links since the conversion, but now I am having trouble. I have opened a support ticket, but don't know how long it will take to get a response. Do you have any suggestions?
It sounds like your files either got corrupted or defaced. I have seen this happen before recently where only index files are affected. Try using your personal backups to re-upload the index file to the server. I hope this helps you :)