Was able to join a meeting and see the "Waiting for the host to start this meeting" screen. Not tested for any functionality beyond that.
https://1drv.ms/u/s!Ak3rCLaXUcr4gW7p9W4xWqWyCrH_?e=tZlrut
https://1drv.ms/u/s!Ak3rCLaXUcr4gW7p9W4xWqWyCrH_?e=tZlrut