Issue

• After upgrading your computer to macOS Big Sur, your ESET product displays the following error message:
  
  "Your computer is not protected: System extension required for Web and Email Protection was not started because of error. Try to restart macOS or reinstall the product."

Solution

1. Go to the Apple menu and select System Preferences.
   
   
2. Click Network.
   
   
3. Select ESET Network Protection Proxy.
   
   
4. Click Connect.