title: OperationError: Failed to execute 'createOffer' on 'RTCPeerConnection when using CEFSharp
body: <p>I have been getting the error &quot;OperationError: Failed to execute 'createOffer' on 'RTCPeerConnection&quot; whenever I open Microsoft Teams on CEFSharp browser and attempt to start/join a meeting with audio and video. The error comes up when i try to mute or unmute. This error does not come up in Google chrome.</p>
  <p>To reproduce error:</p>
  <ol>
  <li>start an instance of CEFSharp browser and navigate to &quot;https://teams.com&quot;</li>
  <li>Start or join a meeting with vieo and audio.</li>
  <li>Attempt to mute audio</li>
  </ol>
  <p><a href="https://i.stack.imgur.com/Kpo1m.png" rel="nofollow noreferrer">enter image description here</a></p>