I had the same problem and it turned out that the controller was setup to connect to the wrong wifi. I found an article that helped (the quick disconnect worked great): https://9to5google.com/2019/1...
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I had the same problem and it turned out that the controller was setup to connect to the wrong wifi. I found an article that helped (the quick disconnect worked great): https://9to5google.com/2019/12/27/how-to-connect-stadia-controller-different-wifi/ Method 1 – Quick disconnect The easiest way to disconnect your Stadia Controller from WiFi, is to hold the Y button when powering on your controller. This tells the controller not to connect to its normal WiFi network but go into set up mode. Method 2 – Factory reset If for whatever reason, the quick disconnect method doesn’t work for you, or if you want to make your controller like new again, the next option is to factory reset the Stadia Controller. As documented by Google, to factory reset, while your controller is off, press-and-hold the Capture and Google Assistant buttons for 6 seconds, until the controller vibrates.