crash-2021-05-30_13.13.45-server.txt
version of mod: 1.16.5-0.20.75

@Necxx Terraforged was never a problem with MCMT because MCMT don't modfi world gen (atleast for now). I used Terrofroged and MCMT on big projects and never had a issues like that. Btw @retroheim did you tried it with a never version of MCMT from the discord? Sometimes this magically solves issues.

Are you using Terraforged?
If so, MCMT may not work since Terraforged have some sort of multithreading implementation for their terrain from what I heard. Not 100% sure if thats the issue though.

Terraforged multithreading is just for TF internal things like noise processing and heightmaps etc.

Are you using Terraforged?
If so, MCMT may not work since Terraforged have some sort of multithreading implementation for their terrain from what I heard. Not 100% sure if thats the issue though.

@Necxx Terraforged was never a problem with MCMT because MCMT don't modfi world gen (atleast for now). I used Terrofroged and MCMT on big projects and never had a issues like that. Btw @retroheim did you tried it with a never version of MCMT from the discord? Sometimes this magically solves issues.

It still crashes with the latest version from the discord.
crash-2021-05-31_11.18.56-server.txt

Discord Integration also has a different error, if it tries loading the discord bot, it crashes the server.

Okay, removed the rats mod and it fixed the issue. So rats has an incompatibility somewhere. Since I tested each time I removed a mod. It crashes when a rat starts path finding. Here's the crash report for extra detail.
crash-2021-06-02_21.44.30-server.txt