I’m not an expert but it may be the prologue save is affecting other gameplay. However, Gearbox may be able to help. I’d recommend submitting a support request at this link: http://support.gearboxsoftware.com
The Early Access version of Battleborn uses the same User profile files as the full retail Battleborn. If you’ve played in Early Access, and launch the main Battleborn game, you will NOT see the link to play the Prologue mission, but cannot queue into other parts of the game, because you “Haven’t played the Prologue yet”. That means, you won’t have any characters unlocked, and will generally have a bad time.
You need to delete your Battleborn User Profile Folder.
Go to C:\Users\<my name>\Documents\My Games
Delete the entire “Battleborn” folder in the My Games folder.
a. The folder will be re-created next time Battleborn launches.
EDIT: Crap just noticed that this is in the PS4 support section, so this might not be relevant…