Does not build

[ericalbers]

Unity 2019.3.15f1 All scenes are in the build settings properly, StartupScene is in Hierarcy on building, get the following error Set for UWP, Hololens, ARM64 (hololens 2), SDK's are all up to date and latest installed.

ArgumentException: The scene is not loaded. UnityEngine.SceneManagement.Scene.GetRootGameObjects (System.Collections.Generic.List1[T] rootGameObjects) (at <e98ed0368295432e8c11e52d6243ee11>:0) UnityEngine.SceneManagement.Scene.GetRootGameObjects () (at <e98ed0368295432e8c11e52d6243ee11>:0) Microsoft.MixedReality.Toolkit.MixedRealityPlayspace.EditorSceneManagerSceneOpened (UnityEngine.SceneManagement.Scene scene, UnityEditor.SceneManagement.OpenSceneMode mode) (at Assets/MixedRealityToolkit/Utilities/MixedRealityPlayspace.cs:215) UnityEditor.SceneManagement.EditorSceneManager.Internal_SceneOpened (UnityEngine.SceneManagement.Scene scene, UnityEditor.SceneManagement.OpenSceneMode mode) (at <a20a50bbfaff4193bf6ba6b262f9a71f>:0) UnityEditor.SceneManagement.EditorSceneManager:OpenScene(String, OpenSceneMode) Microsoft.MixedReality.Toolkit.Utilities.EditorSceneUtils:LoadScene(SceneInfo, Boolean, Scene&) (at Assets/MixedRealityToolkit/Utilities/Scenes/EditorSceneUtils.cs:188) Microsoft.MixedReality.Toolkit.SceneSystem.MixedRealitySceneSystem:EditorUpdateManagerScene() (at Assets/MixedRealityToolkit.Services/SceneSystem/MixedRealitySceneSystemEditorOperations.cs:466) Microsoft.MixedReality.Toolkit.SceneSystem.<EditorCheckForChanges>d__164:MoveNext() (at Assets/MixedRealityToolkit.Services/SceneSystem/MixedRealitySceneSystemEditorOperations.cs:302) System.Runtime.CompilerServices.AsyncVoidMethodBuilder:Start(<EditorCheckForChanges>d__164&) Microsoft.MixedReality.Toolkit.SceneSystem.MixedRealitySceneSystem:EditorCheckForChanges() Microsoft.MixedReality.Toolkit.SceneSystem.MixedRealitySceneSystem:EditorOnInitialize() (at Assets/MixedRealityToolkit.Services/SceneSystem/MixedRealitySceneSystemEditorOperations.cs:151) Microsoft.MixedReality.Toolkit.SceneSystem.MixedRealitySceneSystem:Initialize() (at Assets/MixedRealityToolkit.Services/SceneSystem/MixedRealitySceneSystem.cs:148) Microsoft.MixedReality.Toolkit.<>c:<InitializeAllServices>b__57_0(IMixedRealityService) (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:873) Microsoft.MixedReality.Toolkit.MixedRealityToolkit:ExecuteOnAllServices(IEnumerable1, Action1) (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:975) Microsoft.MixedReality.Toolkit.MixedRealityToolkit:ExecuteOnAllServicesInOrder(Action1) (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:961) Microsoft.MixedReality.Toolkit.MixedRealityToolkit:InitializeAllServices() (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:873) Microsoft.MixedReality.Toolkit.MixedRealityToolkit:InitializeServiceLocator() (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:426) Microsoft.MixedReality.Toolkit.MixedRealityToolkit:InitializeInstance() (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:531) Microsoft.MixedReality.Toolkit.MixedRealityToolkit:RegisterInstance(MixedRealityToolkit, Boolean) (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:669) Microsoft.MixedReality.Toolkit.MixedRealityToolkit:OnValidate() (at Assets/MixedRealityToolkit/Services/MixedRealityToolkit.cs:1389) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)