These are the errors:
(YELLOW)
You are trying to create a MonoBehaviour using the 'new' keyword. This is not allowed. MonoBehaviours can only be added using AddComponent(). Alternatively, your script can inherit from ScriptableObject or no base class at all
UnityEngine.MonoBehaviour:.ctor ()
UnityStandardAssets.Utility.PlatformSpecificContent:.ctor () (at Assets/General Things/Standard Assets/Utility/PlatformSpecificContent.cs:30)
UnityEditor.Build.BuildPipelineInterfaces:InitializeBuildCallbacks (UnityEditor.Build.BuildPipelineInterfaces/BuildCallbacks)
(YELLOW)
UnityEngine.MonoBehaviour:.ctor ()
UnityStandardAssets.CrossPlatformInput.MobileControlRig:.ctor ()
UnityEditor.Build.BuildPipelineInterfaces:InitializeBuildCallbacks (UnityEditor.Build.BuildPipelineInterfaces/BuildCallbacks)
(RED)
NullReferenceException
UnityStandardAssets.CrossPlatformInput.MobileControlRig.EnableControlRig (System.Boolean enabled) (at Assets/General Things/Standard Assets/CrossPlatformInput/Scripts/MobileControlRig.cs:89)
UnityStandardAssets.CrossPlatformInput.MobileControlRig.CheckEnableControlRig () (at Assets/General Things/Standard Assets/CrossPlatformInput/Scripts/MobileControlRig.cs:80)
UnityStandardAssets.CrossPlatformInput.MobileControlRig.OnActiveBuildTargetChanged (UnityEditor.BuildTarget previousTarget, UnityEditor.BuildTarget newTarget) (at Assets/General Things/Standard Assets/CrossPlatformInput/Scripts/MobileControlRig.cs:98)
UnityEditor.Build.BuildPipelineInterfaces.OnActiveBuildTargetChanged (UnityEditor.BuildTarget previousPlatform, UnityEditor.BuildTarget newPlatform) (at <fc4e84dee5004858ad88e6706bb25889>:0)
UnityEditor.Build.BuildPipelineInterfaces:OnActiveBuildTargetChanged(BuildTarget, BuildTarget)
How can I fix them? I am a newbie when it comes to scripting.