This article describes how to resolve the issue if microphone or camera is not working in Google Chrome.
Check that the Camera or Microphone setting is not set to blocked.
1. Select the 3 dots in Chrome and select Settings.
2. Search using the the word "blocked" and then click the arrow for Site Settings.
3. There are site settings for each of your devices. Click the arrow to see the settings.
4. Under the section Block, if there any sites listed, click the trash can to remove them.