I have the same problem with the academic free license.
I have tried to install the license file. For the first time, I have had a demo license (quantum_15.0.lic) automatically by using the qw_license_config, and I didn't realize that VNL did not use the the free academic VNL license (B05553_485b3925ac5c.lic) which was sent to me. Now, I cannot access to the VNL and I become the same message.
If I remove the demo license, I become the message: Demo limit for your IP address has been exceeded.
I have checked in the license file B05553_485b3925ac5c.lic for the type of the license, I find that : # License type : Permanent
Please, need help