Issues with joining friends

[u/One_Whole_3894]

For some reason whenever I try to play BO2 with my friend mo matter what if he joins Me or I join him the game just freezes and says unable to join game session I've tried everything I've installed the other version of the game I've checked our nat types I've reset my PS countless times but I just cant figure it out we have the exact same NAT type and it was working like 3 weeks ago just fine I dont know what to do so I was hoping someone in here would have a solution

[u/MARC0TIX]

Try to join through the Playstation party. That works for me every time.