Following up, It looks like the fix is actually easier than that. All you need to do is uncomment the highlighted line (linked below) in the Public > index.html file :
Uncomment this line:
https://github.com/zoom/meetingsdk-sample-react/blob/master/public/index.html#L53
Additionally, a documentation update request to include this step has been submitted as well. Let me know if you have any questions about this.
Best,