I'm beginner I installed unity 2019.2.0a4 and then download 2D game kit by unity hub. after ending download. I started it and after a long loading and processing works finally unity project loaded. but got me some errors about nonexistent packages: Code (CSharp): An error occurred while resolving packages: Project has invalid dependencies: com.unity.package-manager-ui: Package [firstname.lastname@example.org] cannot be found Package email@example.com has invalid dependencies: com.unity.ugui: Package [firstname.lastname@example.org] cannot be found and another error with this message: Code (CSharp): Library\PackageCache\email@example.com\Scripts\Runtime\TMP_UpdateManager.cs(53,17): error CS0123: No overload for 'OnBeginFrameRendering' matches delegate 'Action<Camera>' please someone helps me for solving this problems. I really like unity and game making. please help me to continue in my way <3 update: I clicked on Help >> Reset packages to defaults now I have these errors: Assets\2DGamekit\Scripts\SceneManagement\TransitionPoint.cs(1,7): error CS0246: The type or namespace name 'Cinemachine' could not be found (are you missing a using directive or an assembly reference?) and Assets\2DGamekit\Scripts\Utility\AutoCameraSetup.cs(3,7): error CS0246: The type or namespace name 'Cinemachine' could not be found (are you missing a using directive or an assembly reference?) now what I must do ?