I am having an issue where I attempt to join the 1.7.10 pack server, but the Java client instantly crashes back to the Technic launcher. This only happens with the XI server; I am able to play singleplayer and other multiplayer servers just fine. I have uninstalled and reinstalled the 1.7.10 pack but the issue still persists. I have seen another post by Ronnrr who has a similar-sounding issue in forums>general discussions forums>introductions.
Crash log: https://pastebin.com/D2aE38Y5