The app has never worked for me (pixel 2 xl fully updated) but I have never had any problems outside of sometimes when I have my vpn running. If u are having some issues connecting with ur browser I would check the basics. Vpn, browser type, configuration, and maybe download a new browser to see if the issue is specific to your browser config. consider defaulting your browser settings and/or router @ 192.168.1.1 or 10.0.0.1. I am guessing that since the forums are not blowing up with the issue that it is specific to your local machine or network.
If you try a brand new browser and it still have the issue go to a tablet that is connected to the network and try to connect through the browser on the tablet. If you can not then the issue is specific to the network. if you can then the issue is specific to the host (pc) configuration on the network.
It would be easy for me to say that the issue is with network configuration BUT I dont have the full list of end user troubleshooting steps. Although this isnt a solution it is my hope that it triggers some thought that leads to one! Best of luck to u my dude.
plz visit win key + r, type cmd press enter then type ipconfig.
your router will be shown next to the words gateway.
it will look something like this.
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . : lan
Link-local IPv6 Address . . . . . : fe80::68ec:78f2:d97a:f114%19
IPv4 Address. . . . . . . . . . . : 10.1.1.172
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.1.1.3
ps: although you may have never made changes in here if u have kids it is very well possible that they have made changes that may have affected the network to get gaming systems working.
I know this is a lot to follow once you do the tablet test let me know ur findings and replay and I may be able to assist.