FTB wont load

  • Tech Support section is for getting help with FTB related problems. If there's a repeatable issue that can be labeled as a bug, then please use the issue tracker for the pack or the app at GitHub issue trackers - If there's no repository for a pack that means that the pack is old and/or will not be updated. Bugs for older packs will not be fixed, unless they are critical.
  • FTB will be shutting down this forum by the end of July. To participate in our community discussions, please join our Discord! https://ftb.team/discord


Active Member
Jun 7, 2020
I just reinstalled the FTB app and it fails to load do to "failed to prepare instances" and goes on to say its the java io exception. Please can anyone help me with this issue? I'm sure its something simple but I cant seem to figure it out.