UberConference Audio Doesn't Work

Description of the issue:

When I use UberConference via the web, I cannot hear any audio using Brave 0.69.132 or beta 0.70.106.

How can this issue be reproduced?

  1. Open an UberConference (uberconference.com)
  2. Click the Headset icon to configure audio/video settings
  3. Expect to hear audio when “Test” is clicked or during calls
  4. Hear silence

Expected result:

Hear audio when Test is clicked or during calls

Brave Version( check About Brave):

Brave 0.69.132 or beta 0.70.106 Windows or Mac

Additional Information:

UberConference works fine in the current Chrome beta.