Having this same problem, After about an hour of experimenting, I figured out a work around. I had to create an account to comment. Hopefully I can help someone.
In export settings, under the Video tab. I found success when I unclicked the button to turn off “Render at Maximum Depth”. You’ll find this right underneath the aspect drop down. Let me know if it helped anyone.
-Jonny Carroll
Dallas Photo and Video Production
https://dtxphoto.com