This isn’t Hostinger support, just the forum for AMP, you’ll want to contact Hostinger regarding any weird account behavior.
One thing it could be, is if the instance versions and CLI tool versions are mismatched.
https://discourse.cubecoders.com/t/how-to-update-amp-to-the-latest-version/2297
Then you’d need to restore the instances.json file a copy of one of the backup files in /home/amp/.ampdata (all as the amp Linux user, su -l amp to swtich)