1. there is an older version that basically is the most stable build, can be downloaded at https://github.com/MediumCraft/mcMMO/releases/download/2.1.218/mcMMO.jar
2. this plugin is tested in 1.19.3, works just fine
3. I will need logs to try and fix this error, so please send the full server log
4. if you have anti-cheats, that is a already known issue
5. there is a new update that I just got, try it out and see if it works for you
Contact me if there are any other issues at discord
Discord: HansLee#4775
(mediumberry5575)