Making a new quest and having it detect the Earth Rune from Elemental Dimensions mod seems to be an issue. After making the quest, the pack was reloaded and from then on whenever the questbook was opened and starting to be explored, the client would disconnect. Reconnecting and trying again would then lock-up the client. Took many tried to get a crash report, but did get one: https://pastebin.com/AbtTz8Hk