Many users have been encountering this error that's preventing them from launching their Autodesk CAD applications (such as Revit, AutoCAD or Inventor).
Product License - Out of Time
License checkout timed out. What do you want to do?
The License manager is not functioning or is improperly installed.
AutoCAD will shut down now.
More often than not, this error seems to be occurring for users who have not recently run the Autodesk Desktop App, nor patched either their installed Autodesk CAD application or installed any of the provided Autodesk Licensing Hotfixes provided via the Autodesk Desktop Application.
To correct this problem, please run the Autodesk Desktop App (found via the Windows Start Menu), log into the app with your Autodesk User ID, and then run all available Autodesk CAD App Service Packs, patches and licensing hotfixes.
If your Autodesk Desktop App is loading but failing to display any options and appearing completely blank, then you may need to uninstall the Autodesk Desktop App, and then reinstall the App using the below link;
If the problems persist, work through the troubleshooting steps listed on the below Autodesk KB article;