In the FTP logs, I see the server responds with “421 Home directory not available - aborting”.
This can have one of two reasons:
- The hosting volume your site is on is not working properly.
- The folder of your website has been corrupted.
I checked a few other accounts on the same hosting volume and they all work, so I think it’s option 2.
If this is a new account, I would recommend to deactivate this account and create a new one. You can go to the Addon Domains section of the existing account to delete the domain from there, so you can add it to another account.