When I check it in About Unity, it says that my License type is Unity Pro and I have the black skin to indicate that I am indeed using Unity Pro. The license is subscription based.
I’ve tried releasing the license and re-applying, but doesn’t change anything.
Yes, I’m using the latest Unity version. My coworker has the same version and he can create and use light probes. I’ve tried releasing and re-activating the key, but it didn’t do anything. As far as I can see, this issue is restricted to just the Light Probes Group and none of the other pro-only features.
All the features specific to Unity Pro check if you have the Pro add-on for the currently active build target.
Switch to any of the build targets for which you have the Pro license and you’ll be able to use the LightProbeGroup component.