Board Thread:Questions and Answers/@comment-38439879-20190206134111/@comment-5815431-20190207214605

If you're trying to join the official Fossils and Archeology server, your mod list doesn't look like the list of mods the official server has.

I'm really not sure at all what could be causing that crash. All I can think of at the moment is to see if you can run this mod and llibrary without any of the other mods just as a test, since it could be an incompatibility causing the problem.