As everybody using the BLT is probably currently aware, the Crimefest 2015 day one update broke the Payday 2 BLT compatibility with the game. Engine updates were necessary for this to occur, and we're aware of the issue.
So hold onto your hats for a little while, we're still getting acquainted with what was added and changed in the updates, and we're working on getting it fixed ASAP.
As a reminder; using mods during Crimefest, where updates will be happening frequently, is at your own risk. They may break and require updating, so be patient while this is all going on.
FYI Steam Community, we are not affiliated with Last Bullet.