Ive just updated my project from Unity 2017 to Unity 2018.3 I had Progrids installed through the asset store previously. I removed the asset store version of both ProBuilder and ProGrids and then went to the package manager and installed them both from there. However, Progrids is giving me an error in the console window: 'UnityEditor.ProGrids.ProGridsEditor' is missing the class attribute 'ExtensionOfNativeClass'! Any way for me to get rid of this error message? Package Manager says its up to date and that im on 3.0.3 Thanks.