When I choose path to arena2 folder in recently released Unity Editor for Linux I get these errors:
NullReferenceException: Object reference not set to an instance of an object
UnityEngine.GUILayoutUtility.BeginLayoutGroup (UnityEngine.GUIStyle style, UnityEngine.GUILayoutOption[] options, System.Type LayoutType) (at /home/builduser/buildslave/unity/build/artifacts/generated/common/runtime/GUILayoutUtilityBindings.gen.cs:205)
UnityEditor.EditorGUILayout.BeginHorizontal (UnityEngine.GUIContent content, UnityEngine.GUIStyle style, UnityEngine.GUILayoutOption[] options) (at /home/builduser/buildslave/unity/build/Editor/Mono/EditorGUI.cs:6478)
UnityEditor.EditorGUILayout.BeginHorizontal (UnityEngine.GUILayoutOption[] options) (at /home/builduser/buildslave/unity/build/Editor/Mono/EditorGUI.cs:6457)
DaggerfallWorkshop.GUILayoutHelper.Horizontal (DaggerfallWorkshop.VoidDelegate callback) (at Assets/Daggerfall Unity/Scripts/Editor/GUILayoutHelper.cs:56)
DaggerfallWorkshop.DaggerfallUnityEditor.<DisplayImporterGUI>m__3B () (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:257)
DaggerfallWorkshop.GUILayoutHelper.Indent (DaggerfallWorkshop.VoidDelegate callback) (at Assets/Daggerfall Unity/Scripts/Editor/GUILayoutHelper.cs:43)
DaggerfallWorkshop.DaggerfallUnityEditor.<DisplayImporterGUI>m__35 () (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:252)
DaggerfallWorkshop.GUILayoutHelper.Foldout (Boolean toggle, UnityEngine.GUIContent label, DaggerfallWorkshop.VoidDelegate callback) (at Assets/Daggerfall Unity/Scripts/Editor/GUILayoutHelper.cs:29)
DaggerfallWorkshop.DaggerfallUnityEditor.DisplayImporterGUI () (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:250)
DaggerfallWorkshop.DaggerfallUnityEditor.OnInspectorGUI () (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:117)
UnityEditor.InspectorWindow.DrawEditor (UnityEditor.Editor editor, Int32 editorIndex, Boolean forceDirty, System.Boolean& showImportedObjectBarNext, UnityEngine.Rect& importedObjectBarRect, Boolean eyeDropperDirty) (at /home/builduser/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1162)
UnityEditor.DockArea:OnGUI()
InvalidOperationException: Operation is not valid due to the current state of the object
System.Collections.Stack.Pop () (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections/Stack.cs:329)
UnityEngine.GUILayoutUtility.EndLayoutGroup () (at /home/builduser/buildslave/unity/build/artifacts/generated/common/runtime/GUILayoutUtilityBindings.gen.cs:222)
UnityEngine.GUILayout.EndVertical () (at /home/builduser/buildslave/unity/build/artifacts/generated/common/runtime/GUILayoutBindings.gen.cs:266)
UnityEditor.EditorGUILayout.EndVertical () (at /home/builduser/buildslave/unity/build/Editor/Mono/EditorGUI.cs:6556)
UnityEditor.InspectorWindow.DrawEditor (UnityEditor.Editor editor, Int32 editorIndex, Boolean forceDirty, System.Boolean& showImportedObjectBarNext, UnityEngine.Rect& importedObjectBarRect, Boolean eyeDropperDirty) (at /home/builduser/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1175)
UnityEditor.InspectorWindow.DrawEditors (UnityEditor.Editor[] editors) (at /home/builduser/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:969)
UnityEditor.InspectorWindow.OnGUI () (at /home/builduser/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:350)
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)
If I try to import anything, I get something like this:
DFTFU 1.3.31: Unknown location RegionName='Daggerfall', LocationName='Daggerfall'.
UnityEngine.Debug:Log(Object)
DaggerfallWorkshop.DaggerfallUnity:LogMessage(String, Boolean) (at Assets/Daggerfall Unity/Scripts/DaggerfallUnity.cs:280)
DaggerfallWorkshop.Utility.ContentReader:GetLocation(String, String, DFLocation&) (at Assets/Daggerfall Unity/Scripts/Utility/ContentReader.cs:130)
DaggerfallWorkshop.Utility.GameObjectHelper:FindMultiNameLocation(String, DFLocation&) (at Assets/Daggerfall Unity/Scripts/Utility/GameObjectHelper.cs:516)
DaggerfallWorkshop.Utility.GameObjectHelper:CreateDaggerfallLocationGameObject(String, Transform) (at Assets/Daggerfall Unity/Scripts/Utility/GameObjectHelper.cs:526)
DaggerfallWorkshop.<DisplayImporterGUI>c__AnonStorey6:<>m__3F() (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:302)
DaggerfallWorkshop.GUILayoutHelper:Horizontal(VoidDelegate) (at Assets/Daggerfall Unity/Scripts/Editor/GUILayoutHelper.cs:57)
DaggerfallWorkshop.DaggerfallUnityEditor:<DisplayImporterGUI>m__3B() (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:297)
DaggerfallWorkshop.GUILayoutHelper:Indent(VoidDelegate) (at Assets/Daggerfall Unity/Scripts/Editor/GUILayoutHelper.cs:43)
DaggerfallWorkshop.DaggerfallUnityEditor:<DisplayImporterGUI>m__35() (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:252)
DaggerfallWorkshop.GUILayoutHelper:Foldout(Boolean, GUIContent, VoidDelegate) (at Assets/Daggerfall Unity/Scripts/Editor/GUILayoutHelper.cs:29)
DaggerfallWorkshop.DaggerfallUnityEditor:DisplayImporterGUI() (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:250)
DaggerfallWorkshop.DaggerfallUnityEditor:OnInspectorGUI() (at Assets/Daggerfall Unity/Scripts/Editor/DaggerfallUnityEditor.cs:117)
UnityEditor.DockArea:OnGUI()
Since I have such errors only in Linux version of the editor, it should be reported in its forum, but I don't have enough knowledge of DTFU to properly explain the problem.