PS4 - help needed.

I downloaded the PS4 version and tried to transfer my PS3 charcters over. It came up with an error code NP-31865-3. I thought maybe I needed to delete and reinstall the game but now it says the game is not available for purchase. I am unable to download the PS4 version again to see if it was just a bad install.

Thank you for your help.

Edit - Ok I found out how to download it again. But will i still have the that error when i try to use my PS3 character? Guess i will have to wait to see.