Autodesk offers several flavors of Revit. Each has a unique product key. Do not confuse these with the standard version.
section will appear, displaying both the serial number and the product key. Common Identifiers Product Key : For Revit 2023, the standard product key is typically Serial Number
Which of those would you like?
Have you successfully installed Revit 2023? If you continue to face serial number errors, contact Autodesk Support directly via their live chat—they are remarkably helpful for genuine license holders.