When I try to use this mod under Mohist server, server was crashes.

Additional information:

• minecraft version: 1.12.2
• Mohist version: 7bb5453
• mod version: 2.0.0.1
• crashlog file or gist: crash.log

It even can't open any way.

You provided only a couple of lines from the crashlog, and the only thing I can read from it is that something tried to close the game programmatically - usually this is done by something that catched some error and possibly logged it above or below the lines you provided, or maybe Mohist did that - the point is that the exact error you provided seems not really related to this mod.

I am sure that it does not work because of my mod, since it is so fragile atm, but I can't do anything due to lack of info.

And also the mod is being partially rewritten at the moment so in the future this exact crash (or whatever) may not even occur.

Mohist was only return this message, and I translate it.