That sounds like it’s a commercial service. They should have a support option you can ask. It sounds like their deployment scripts are broken. Ansible and Docker are the easiest ways to run Lemmy, I’m guessing these guy’s scripts are just grabbing the docker images and launching them for you.
No, it won’t work if it’s deployed wrong. Is this a shared host or a VPS service? If it’s a shared host and you’re just clicking a button to deploy a software package, it that host’s job to make that button work right.