If there is a F10 Camera hotkey on your keyboard of the computer (1), please turn the camera on first. (This hotkey lets you turn on/off the camera quickly.) If no, please go to the privacy settings below.
Note: The hotkeys functions may be different based on different models.
Press F10 key on the keyboard or using the combination key of . When the notice of Camera On is displayed on the screen (2), it means that it is ready to use the camera.
Some applications or services may ask the camera authorization for the first time, and you also can set up which apps are allowed to access your camera via the following Windows settings.
Type and search Camera privacy settings in the Windows search bar (3), then click Open (4).
Turn on Camera access (5).
Turn on Let apps access your camera (6).
Expand the Let apps access your camera filed, here you can turn on/off which apps can using camera (7).