Hi MaureenBooysen . Thank you for reaching out. My name is Jayson, an Independent Advisor for Microsoft and a user just like you. I'll be glad to assist you.
Check if the app permission is on.
Start Menu>Settings>Privacy>Camera, then make sure that "Allows apps to access your camera" is "On" then scroll down and choose which application you want to use the camera and click "On". After changing the settings, restart your laptop for changes to take effect.
Hope this helps. Let me know if you need more assistance.