This looks like licensing issue. Please try out the following steps:
1) Execute the command given below:
Depending upon the output of the above command, follow the next steps.
2) If output is 1, then this mean the toolbox with a valid license has been installed properly. In this case, try the following commands:
If you are still facing the same issue, contact MathWorks Installation Support.
3) The output throws an error message and the error number is "39". This means that you have a network license and the administrator has not given you the permission to work with this toolbox. I would suggest asking the administrator of your organization to grant you the permission for the same.
4) In case of any other scenario, contact MathWorks Installation Support.