Trying to play on a modded LAN server with my friend, when I try to join their LAN world I get the "Failed to synchronize registry data with server, closing connection" message, and they get the same message when trying to join my LAN world. We have the same forge version 35.1.12, all the same mods with the same versions of those mods as well as the same configs.
My forced crash report:
https://pastebin.com/XMG5Z5Bi
Friends forced crash report:
https://pastebin.com/eXk8qQQT