Log in failure?

So me and my boyfriend play overwatch together (him ps5 and me pc) however for the last two days weve been unable to connect to the game? he gets error 3048 and mine just says cant log in. As we’ve been trying to solve this for the past few day we are now stuck, nothing works (restarting our router and modem, deleting the game and redownloading, checking our Wi-Fi etc) what could the issue be? is it a network issue or are we missing something? (neither of us are banned from the game if that’s relevant)

Where are you located ?
What Internet Service Provider are you using ?