Before trying the more invasive step of deleting cache & cookies, I would also suggest, if the problem doesn't exist in the incognito or another browser, to check if an extension might cause the issue in the browser for you.
Here's how you can check and deactivate extensions, when they're deactivated, try again if the problem still exists. If it works, then you can activate one extension after the other to find the faulty one. If you found the one causing the issues, contact the developer and mention to them that their extension doesn't work with stadia.google.com and hopefully they can fix it, but until then I wouldn't use that extension anymore to play Stadia.
Afterwards I do also recommend to check that you have the most recent Chrome version.
If this is not the case, you can indeed continue with deleting cache & cookies in the browser.
Here are some other things as well that you can check afterwards if both doesn't help:
- Check that your Chrome Browser is not blocked by any Malware (check here step 5).
- Check your PC if there is any Malware/Virus installed that might cause issues in your browser. Try to just run an antivirus-programm to isolate this.
- Check if you have experimental Features (Chrome flags) activated:
- Go to chrome://flags.
- Search a specific theme to your problem with the search bar and check if you can disable this feature, e.g. "enables pointer lock options" or "hardware accelerated video decode".
- If you can't find those, click on "reset to standard" in the top right corner to enable the standard-settings of the browser.
