There is no message, I was just saying it would be good to have the possibility to add a warning message with a link to update if WebView is out of date.
When the WebView is out of date, it does show a message. It says "Software update needed" with instructions.
WebView version 71.0.3578.99 should be able to run C3 runtime games just fine.
So I think we're back to square 1 - I doubt it's solely because of an old WebView version. There must be something else going on.