I also am receiving the exact same error on a RPi4B. Tried both HDMI ports and played around with various video settings. I also posted a debug log in general support today and hope for a fix.
Looks like I'll be staying on my Pi3 until this issue is addressed.
Edit: I had not tried using the HDMI port closest to the power jack - after switching to it, I do indeed have both video and audio.
Glad there seems to be a fix (at least for me)!