"You have lost connection to playstaion network"

Every time I play battlefront I can never play the modes I want. This is because of the error "unable to connect to PlayStation network." this happens with all but two modes a session. Usually I can play Heroes vs. Villains or cargo but sometimes cargo doesn't work and hero hunt does. I have only been able to access walker assault once. I need to know the fix.

reddit link:  https://www.reddit.com/r/StarWarsBattlefront/comments/3t5bax/ps4losing_connection_to_psn_network_when_joining/