If you can provide a way I can reproduce the issue, I can address and fix the issue.
In the meantime, all we have is a single case of newer commits causing you issues, and hundreds upon hundreds of other cases where it works.
If you want to know how to fix this, start with only one server, on the latest commit. Test that the server and webui works.
Then, add one more. Test again.
You have nine servers. If even only one is causing problems, 8 will suffer. However, how am I to know which is doing it? We’d need to do it systematically.
Clarification: Adding a server means it’s not in
/var/games/minecraft/ anywhere–so put it in your home directory. I think the easiest way to do this is to make an archive of ALL your servers. Then, move all your latest archives to your
/home directory. Finally, one by one, copy/move them to
/var/games/minecraft/import and import them.