My packaged .apk was working fine, but after working a week in my game without packaging for tests, this happened.
First, I had three errors: “This project requires the PluginBrowser plugin” & “This project requires the VisualStudioSourceCodeAccess plugin” & the error I told about in my question. The two plugins mentioned were enabled and working. But, for some reason they weren’t being packaged with the game.
With those in mind, I disabled those plugins. Now the only error I have is “Error: CDO Constructor (VehicleWheel): Failed to find /Engine/EngineMeshes/Cylinder”