This issue may be caused by security permissions. Here is how you can edit permissions:

• Click the Apple menu
• Click System Preferences
• Click Security & Privacy
• Click the Privacy tab
• Click Screen Recording (Left options menu)
• Click the lock icon to make changes (you will need to enter your admin password)
• Click the checkbox next to the apps that you are having problems with (e.g.,  Zoom, Teams, etc).
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• Before the changes can take place, you need to restart the app, a notification window will ask you to do that also. Restart it and try again.