Router Blocking Wifi to PS5

Hello!

Since friday the ps5 has not been able to connect to the wifi even though on the app it says it is and has a connection. It is saying the service providor or router is preventing it from conecting to the internet. I've tried forgeting it on the app, the device itself, changing the wifi settings,and restarting the router and it keeps saying its on the routers end. Is there a way this can be fixed and the router can unblock it. This has not been an issue for the 3 years its been conected and the ps5 didnt have an update so im thinking it has to be on the routers end.