You are using a network lock, and a Worx Plugin will not find a license.
There could be several causes for this. Please check the following:
All licenses have been claimed by other users.
The user's machine is not finding the license server.
The user's machine is not running the latest HASP driver.
If all licenses have been claimed, users that no longer need a license must restart their AutoCAD or BricsCAD.
Check the Sentinel Admin Control Center for the servers IP
Here's a gif on how to connect to your license server. You'll have to find the server name where the red license dongle for the Worx Plugins is located.
Navigate to http://localhost:1947/_int_/devices.html
If you see a key with Vendor ID: 88104, jump to Solution step 3, if not, continue to d.
Choose Configuration from the menu on the left.
Choose the Access to Remote License Managers tab
Check the Aggressive Search for Remote Licenses
Enter the server IP or Server name in the Remote License Search Parameters
Click Submit when finished.
Close down all Worx products, including AutoCAD or BricsCAD if the plugin is running inside of one of them.
Wait a few minutes and recheck the Sentinel Keys menu to see if the key is found. This can take up to 15 minutes on larger networks.
Download the latest drivers from Thales' website.
Navigate to: Thales Support
UnBlock all downloads before unzipping or installing. Windows Blocking Downloaded Files...
All installs should be installed with Right-Click → Run As Administrator