I really don't want to be bothering people with what is likely a simple solution, I just can't seem to figure out the problem. I have a modded server, with about 60 mods on it, and I'm getting this crash report:
I'm assuming from the error name that I'm missing a mod or have a mod that doesn't belong. I don't know what it is. I've tested this on client and it works fine, and I believe I've removed all of the clientside only mods, such as the mapwriter mod.
Sorry and thanks in advance.