I literally have the same issue! Have you tried setting the resolution to 720p? If you don’t already know, since you can’t get to the settings screen in-game, you can do it manually in your prefs.xml file.
I am not able to get past the page even if I don’t pair any devices, so I don’t think it has anything to do with Bluetooth or connectivity.
However, if my settings are at 720p resolution, I can proceed past the page. AND I can then increase the resolution and ride, as I did this morning for 27 miles! But upon restarting Zwift, since it’s in 1080p resolution, the issue again happens. So I go into the prefs.xml file and manually change the resolution back to 1280x720, and Zwift will run again.
For this reason, I believe it’s related to graphics drivers, OpenGL, or something GPU related in Zwift’s code. It only started after the last Zwift update.