Being able to play split screen need to copy a gun iwakarhu wont give

my xbox1 will not allow me to play split screen. I Cant create another character and if try to warning comes up saying cannot save I play alone and need to copy the legendary rocket launcher the “thingy” so I can grind xbox 1 not allowing anything I tried to guest in does not work tried to add new does not work Help thank you

Gearbox think that duping is cheating. It’s not welcome on this forum. Please read the forum rules before posting again. If you’re encountering technical difficulties, use the Tech support section of the forum.