Not sure exactually what is tripping it but it seems to be when browsing tabs on the guidebooks with XyCraft installed and your mod related to the log here. versions should be in the crash log. I think its related to something that xycraft adds to its tool tips.

https://mclo.gs/WOhfTvQ

same problem https://mclo.gs/WHWECMT

updated xycraft, xycraft machines and xycraft world seems to have fixed the problem