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Loggin error HELP

I have both pc and psn game account,used to play GOW every day without any connection problem,but recently when i login the game the error “unable to download server config” popup usually during 6:00 - 12:00am BeiJing time,this connection problem happened both on my PC and PS4,through vpn i can login the game on PC but get trouble with psn login,i just wonder why?can anyone help?