Forbidden (10403)

When you try to download and install the latest macOS updates, the process may sometimes stop unexpectedly with the following error message: “An error has occurred, not found (10403)“. If you already restarted your Mac but the problem persists, pursue the troubleshooting solutions below…

https://appletoolbox.com/an-error-occurred-not-found-10403/#:~:text=%20How%20Do%20I%20Fix%20%E2%80%9CAn%20Error%20Has,If%20you%E2%80%99re%20trying%20to%20download%20multiple...%20More%20

Fix: An Error Has Occurred, Not Found (10403) on Mac - AppleToolBox