i have already put at least 7 hours in pixelmon and all of a sudden i tried logging on and everytime i click the server it says failed to login : null what do i do!?
Easy fix go to your %appdata% folder if your using technic/curse forge (should still work the same) delete your launcher file, it should delete the entire folder/launcher with it. Then just redownload your launcher and mod pack and your good to go.