Can I play on the PC version if my account originated from the PS4 version??

[DanceLouisDance]

I bought the game on PC and PS4 to play with my brother, I tried logging in with my account from the ps4 but it says service is unavailable or something along the lines then mentions if i was a free trial or not.

so basically there a seperate account connected to the pc and another connected to the ps4 version. Can i cross the accounts to the same "game"

Edit: Can i use the same activation key on two different accounts?

I am on the free play period that you get for purchasing the game.