Topic category: Troubleshooting, bugs, and solutions
I used the mohist server to test the MOD, I made with mcreator. Maybe the client MOD, should not be loaded on the server side, but the MOD creature can cause the server side to crash.
At the same time, I also used arclight to test, although the MOD creature can be used normally, but entering the new world will lead to an error. In short, when you enter the Mod world, you will see the biological projection of the original main world. When you return to the original main world, you will see a biological projection of the Mod world. (not physical, untouchable).
Here are the test pictures of arclight: