A black square will appear if your web cam is not fully functioning or if you did not allow Adobe Flash to use your camera and microphone. 📸
Follow these steps:
1. Right-click the blank (black square) area.
2. Click Settings.
3. Click the webcam icon and change the camera option to match the webcam that you use. For example, if you are using a built-in webcam, select Integrated Camera.
4. Click the privacy icon and ensure that the option Allow is selected.
5. Click Close. If the webcam is working, a preview appears.
Still dosen't work?
Then there can be an issue with your camera, test that your web camera is working. Note that: Flash works different in different browsers, when troubleshooting, try changing browser. Good luck!