I have zero clue what its problem is. This has happened once before but I just restarted my PS5 and it started working again.
It wint connect to the network through Wi-Fi or through LAN. for Wi-Fi it gives me a short error message telling me that my ISP or Router is preventing me from connecting to the network. When I try to connect to LAN it gives me a far longer message telling me to "authenticate my network" but I cant because I have to go to a website from my ps5 which I cant go to because it wont connect to the internet.
I have tried restarting my router, ps5, both at the same time, changing DNS settings, changing band frequency, etc. No fix that I have found and tried has worked. Im at a loss.
Source: r/PS5HelpSupport · by /u/No_Dependent_8485