NullReferenceException: Object reference not set to an instance of an object
The complete error is here:
NullReferenceException: Object reference not set to an instance of an object
PerfectParallel.CourseForge.UI.FileToolUI.CheckCourse () (at Assets/Perfect Parallel/Course Forge/Scripts/Editor/UI/FileToolUI.cs:127)
PerfectParallel.CourseForge.UI.FileToolUI.OnUI (Boolean selected) (at Assets/Perfect Parallel/Course Forge/Scripts/Editor/UI/FileToolUI.cs:82)
PerfectParallel.CourseForge.UI.MainToolUI.OnScene (Boolean selected) (at Assets/Perfect Parallel/Course Forge/Scripts/Editor/UI/MainToolUI.cs:420)
PerfectParallel.CourseForge.UI.MainToolUI.OnScene (UnityEditor.SceneView view) (at Assets/Perfect Parallel/Course Forge/Scripts/Editor/UI/MainToolUI.cs:755)
UnityEditor.SceneView.CallOnSceneGUI () (at C:/buildslave/unity/build/Editor/Mono/SceneView/SceneView.cs:2013)
UnityEditor.SceneView.HandleSelectionAndOnSceneGUI () (at C:/buildslave/unity/build/Editor/Mono/SceneView/SceneView.cs:1359)
UnityEditor.SceneView.OnGUI () (at C:/buildslave/unity/build/Editor/Mono/SceneView/SceneView.cs:1192)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
I am not sure what changed on this course. It was working, then I added some terrain painting, some textures, added a cart path using Easy roads, removed the folder and now I cannot even build the course due to the error. This error pops up when I go to compile or build the course using Course forge build icon in Unity.