• Ensure that you are using a supported browser and operating system.
• Restart the web browser
• Clear cache and cookies
• Test on an alternate internet connection
• Making sure the camera or microphone work on the proprietary software
• Sound
  • Chrome Settings for camera & microphone 
    https://support.google.com/chrome/answer/2693767?co=GENIE.Platform%3DDesktop&hl=en&oco=0 
  • Chrome Individual site settings 
    https://support.google.com/chrome/answer/114662?co=GENIE.Platform%3DDesktop&hl=en - 
  • Firefox Settings for camera & microphone 
    https://support.mozilla.org/en-US/kb/how-manage-your-camera-and-microphone-permissions
  • Windows 10 Steps/Settings to test Microphones
    https://support.microsoft.com/en-us/help/4027981/windows-10-how-to-set-up-and-test-microphones 
  • Mac Steps to adjust your sound input settings 
    https://support.apple.com/kb/PH22070?locale=en_US

Note: Volume issues can be resolved by clicking on the gear icon on the bottom right corner. From there you can see options to increase the microphone and speaker volume.