This licensing error can occur when activating/deactivating a web-activated license, most commonly standalone licenses.

Error Message:

Resolution:

You must be logged into the machine as Administrator to run the license cleaning utility, lsclean.exe.
Run a command prompt explicitly as Administrator (this is a right-click option):
Change the folder to the C:\Program Files\Computers and Structures\[PRODUCT NAME\CSiLicensing folder and type the following command:
```
lsclean -fixrevoke
```