Insert jar file

im trying to load in a forge 1.12.2 jar file since the highest my web ui shows is 1.8.9 how would i do that? i already put my old server (from a windows machine) in a zip file and put it in import folder and its showing up in the import server tab but pressing create server from archive doesnt do anything.

What’s the layout of the zip and what’s the total size?

Have you tried Updating the Webui?

Do you see CPU/Server usage/load go up after clicking on create? Does a server not show up a bit after clicking on create and/or can you not locate the server in it’s /var/games/minecraft/servers/<server> directory afterwards? (You may have to refresh)