Have you tried repairing the core files?
You can do that by following the steps
Go to your server control panel then press Danger Zone then press Repair core files
This is because you have Command Blocks disabled in your server settings. Please follow the steps.
Go to your server control panel then press Settings > Then scroll down till you see Command blocks then press Enabled and then Save.
I'm pretty sure that means the server was either suspended or maxed out on server storage. Please correct me if i'm wrong. You can contact support at
http://minehut.com/support