i have exactly the same issue. i cant open the viveport or any apps that require an internet connection such as desktopVR.
i am connected to the internet (wifi) in the settings. its says there is an excellent signal. green to go.
i try to open Viveport and it says to login with my account. then it takes me to the next page that says i am not connected.
i dont have a vpn and the router is BT wifi which has worked for the last six months with this headset.
suddenly this headset is now completely useless as a standalone.
the headset only works when streaming from a pc.
also, my headset resest the boundarys literally everytime i put it on my head.
1300 GBP device that does not work now.