Here's a log:
https://mclo.gs/RCqGPAm

I'm using many mods, so it might be an incompatibility with another mod.

I'm also using Quilt, which is not officially supported, but I hope to get support anyway

I am curious how you established Terrestria is responsible. At a guess perhaps because the error is reproducible but if you disable Terrestria, then it no longer occurs. This could be related to Quilt, but it also might not. We have not had any other reports of this particular error, so I am more inclined to suspect it is an interaction with another mod. I do not debug our mods on Quilt at this time, so we need a reproduction on Fabric for me to try to look into the problem. It's entirely possible the incompatible mod does not support Fabric, of course...