I tried playing stadia after getting its pro subscription for the first time. I tried to play a bunch of games but every single game is just saying that I can't play them on my PC due to the slow Internet connection. Everywhere it is showing that Stadia needs 10+ mbps connection. Even though I am having 50+ mbps connection I cant even play a single game. I even tested my Internet Speed on the Stadia. And you know... it Sucks!!!
same problem!!
Check if you are connected via Ethernet. If not, try to do so.
It is already connected with Ethernet.