Modpack wont load after pressing launch

  • 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.
  • The FTB Forum is now read-only, and is here as an archive. To participate in our community discussions, please join our Discord! https://ftb.team/discord

PJ_Skyrix

New Member
Mar 25, 2021
1
0
2
Hi guys i got this problem. Can someone help me ?
2021-03-25 12:04:09 [SEVERE] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.remove(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
MC process exited. return value: 0

FULL LOG FOR DOWNLOAD BELOW
 

Attachments

The classic launcher is no longer supported, please use the FTB App linked on the main download link on the homepage.