I cannot open the license server page after Microsoft Windows 10 Creators Update was installed

The V-Ray Online License server runs as a service on the machine where it's installed and should be present at all times. Note that the Microsoft Windows 10 Creators Update may remove the service (VRLService) for the V-Ray Online License server.
If you experience any licensing issues after applying this Windows 10 update, please re-install the V-Ray Online License server in order to solve it. You can download it from here