I managed to reproduce the error, and it is indeed a compatibility issue between James' mod and mine. I tried to fix this, but I unfortunately did not manage to do this in a way that would make it future-proof. In order to not cause further issues, James' mod will be listed as incompatibility in future versions. Sorry about that. :(
I will look further into it in the future as there probably is a way to fix this, I have just not found it yet..
Thanks for the bug report! (´∀`)b