The OrbitalCamera and ClassicCamera modules call the method self:GetVRFocus() under the wrong assumption that the inherited class BaseCamera defines it. The VR stuff in these modules looks to me like leftover code that hasn’t been removed.
The codepaths that call this missing method do execute in some scenarios, as I occasionally see errors in analytics.
(Don’t use the line number in the screenshot; I have made unrelated modifications to the code which change the line numbers. In the unmodified code the occurrences are at ClassicCamera:187, ClassicCamera:220, and OrbitalCamera:250.)