You may face this problem if your license for the Device Cloud add-on has expired. The license for this add-on is always time limited. After it expires, you can purchase a renewal.
To disable the unavailable features and continue using TestExecute, click Disable in the error message box.
To activate the add-on, purchase and activate a license for it
You can also try resolving the problem by using the Licensing Troubleshooter on our web site:
The troubleshooter will also help you collect information needed to submit a request to the SmartBear Support Team.