Any advice on how to resolve this would be greatly appreciated.
If you post this, make sure to fill in the bracketed information (like your OS version). If you have a screenshot of the specific error pop-up, attaching it is always helpful. chaos vantage license error
Ensure your subscription includes Vantage and isn't just for V-Ray Solo. 4. Advanced Troubleshooting: The "Clean Reinstall" Any advice on how to resolve this would
Dealing with Chaos Vantage License Errors: A Quick Troubleshooting Guide chaos vantage license error
If you are trying a new version (like the Vantage 3.0 Beta), ensure you have actually signed up for the beta on the Chaos site to add that "entitlement" to your account.