If that's correct, confirm and tell me:

Turn your security software back on immediately after. 4. Run as Administrator

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The is a common licensing issue that occurs when users attempt to activate or validate a standalone, perpetual, or multi-user license for engineering and design applications like AutoCAD, Revit, Inventor, or Maya . This error typically flags a failure in local license validation , indicating that the client machine cannot properly generate or process an offline Request Code/Activation Code combination or communicate with the authentication servers.

: Over-aggressive third-party firewalls or antivirus software blocking background verification scripts.