Problems with the cooperative (Dying Light)

People, hello to all, such a question: yesterday began to play with a friend in the coop on PS4, everything was normal. Today we enter the game, he throws me an invitation, as usual, I accept, but I can not connect to it, gives the message "It is impossible to connect to the game in which you participate." If I give him an invitation, he can't join me either. Yesterday everything was normal, today no way. Has anyone come across what's going on here?