whatevsnjn

I had the same problem. Try going to "danger zone" on your sever dashboard and click "repair files". If that does not work then try restoring a backup of the server.

When will the commands come back? I can't upload my world either on the dashboard or in the game.

I have a problem but neither of the methods that people have suggested work... /ul does not work as it says the command does not exist (all of the command including just /ul) and every time I upload the world in the dashboard it says that there was an "unexpected error". Does anyone have any ideas?