Changing resolution screws things up with Minecraft on Linux

I’m not good with Linux but wanted to set up a Minecraft server, therefore I bought a VPS. Everything was fine until I changed the resolution from 1920x1080 to a smaller one. I can’t remember what the exact resolution looks like, but it was in the 10:9 category. How can I fix this issue?

Hello @Jonathan

for 720p HD you can set 1280 x 720
for 1080p is Full HD 1920 x 1080