Unable to join friend PS5

Hi me and my friend have played this game for a week and then after the v1.28 update we have been unable to join each others game had multiple errors such as host no longer connected or using a different version I have a ps5 and he has a ps4 we have tried unistalling the game trying to join random games online but no success with trying to play with each other, on the main menu it says that we have two different versions of the game with my V number being higher than his. It’s a shame because we both really enjoyed this game.

If anyone has had the same issues and knows a fix please let me know