So the issue is to do with Better Advancments for the progression of the modpack, a player will be able to complete quests but the items which or forbidden origionally will still stay forbidden, so ...

Here are the logs after a few attempts, then changing the instance folder location, followed by another attempt, then trying a different modpack install (which worked), then nuking the instances ...

SevTech: Ages is a massive modpack packed with content and progression. This pack focuses on providing the player a long term progression experience with purpose. SevTech introduces a number of ...