Seems to be a thing with gmusicapi and 2fa authentication. There's an open issue on the project's GitHub that has been unresolved for ages.
All I can suggest is take that up with the gmusicapi project, or use BubbleUPnP to render and send your Google Music to moOde, use Bluetooth (sound quality isn't great on Google Music anyway) or take an opportunity to try out Tidal and use that with BubbleUPnP. There's plenty of options.
All I can suggest is take that up with the gmusicapi project, or use BubbleUPnP to render and send your Google Music to moOde, use Bluetooth (sound quality isn't great on Google Music anyway) or take an opportunity to try out Tidal and use that with BubbleUPnP. There's plenty of options.