The License Manager is not functioning or is improperly installed. Revit 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, nor 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;
However as these steps are extensive, you're more than welcome to log a support ticket with the A2K Technologies support team for further assistance on this issue.
Phone: 1800 223 562