Failed to login: Bad Login

  • 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.


Title Failed to login: Bad Login

Launcher Type Twitch Desktop App

Modpack Unleashed

Modpack version 1.5.2

Have you modified the pack? No

Link to log file

Details of the issue Any time I try to log in to any FTB: Unleashed server I get the following error.

Connection Lost
Failed to login: Bad login

I have a legitimate copy of the game, and the minecraft login servers have been up when I am attempting to connect. In fact I can connect to vanilla MC multiplayer without issue.


Jack of All Trades
Retired Staff
Aug 20, 2012
In settings, go to the Minecraft section and set it to use jar launcher not the native launcher. Mojangs new launcher does not work for old versions.