Just an FYI for everyone who's encountering the same issue, until this gets fixed, there are some inferior alternatives, google videostream alternatives reddit. The one I found doesn't support subtitles and is less polished but it does work for me.

This seems to be related to recent updates to google's cast extension. If you install the chrome beta or cast extension beta this is an automatic problem. For me though, google recently updated their mainstream cast extension so I'm having this problem again. No word from the devs for a month? Anyone been able to find a fix/ workaround for this problem?

Same situation here