Try changing the port of the license server to something different. In the start menu, type Change V-Ray license settings
This will open a window like this:
Why the license web say this Failed to read certificate. (ENOENT: no such file or directory, open ‘C:\Program Files\Common Files\ChaosGroup\ssl\cert.crt’)
“Failed to read certificate. (ENOENT: no such file or directory, open ‘C:\Program Files\Common Files\ChaosGroup\ssl\cert.crt’)” indicates that Online licensing is not enabled - hence there is no certificate to read. The error can also appear when the activation process is still pending. If you acknowledge the message it shouldn’t appear anymore.
Regarding the problems with the dongle - is it possible that there are different driver versions on the computers. The new license server versions (4.x.x) do not work well with older drivers - I’d recommend using at least version 6.32 (the driver version can be seen in Control Panel->WibuKey->“About” tab).
You can try running manually only the dongle license server process on the problem computer to see if you’ll get a popup error indicating a certain problem - C:\Program Files\Chaos Group\VRLService\OLS\bin → “startvrlservice.exe” (VRLService in Windows’ services must be stopped before you try to start it manually).