What is a NotReadableError?
A NotReadableError can occur when the camera is already in use by a different application on Windows.
Even if you've granted permission to access the camera in your browser, a hardware error occurred at the operating system, browser, or Web page level which prevented access to the device.
If this problem persists, please complete the test below. This test checks if the browser can access the camera on that device, more specifically, checks to see if the getUserMedia browser request succeeds.