Hi everyone, since Unity 2019.4.29f1 my Project partner and I both get the following Errors when we click the "View History" in Collab: ArgumentNullException: Value cannot be null. Parameter name: styleSheet UnityEngine.UIElements.VisualElementStyleSheetSet.Add (UnityEngine.UIElements.StyleSheet styleSheet) (at <a762163a9d8940379c4a7fefdfb42d83>:0) UnityEditor.CollabHistoryWindow.AddStyleSheetPath (UnityEngine.UIElements.VisualElement root, System.String path) (at Library/PackageCachefirstname.lastname@example.org/Editor/Collaborate/Collab/CollabHistoryWindow.cs:96) UnityEditor.CollabHistoryWindow.SetupGUI () (at Library/PackageCacheemail@example.com/Editor/Collaborate/Collab/CollabHistoryWindow.cs:110) UnityEditor.CollabHistoryWindow.OnEnable () (at Library/PackageCachefirstname.lastname@example.org/Editor/Collaborate/Collab/CollabHistoryWindow.cs:62) UnityEditor.Web.JSProxyMgr: DoTasks() NullReferenceException: Object reference not set to an instance of an object UnityEditor.CollabHistoryWindow.OnDisable () (at Library/PackageCacheemail@example.com/Editor/Collaborate/Collab/CollabHistoryWindow.cs:74) UnityEngine.GUIUtility: ProcessEvent(Int32, IntPtr) After upgrading to 2019.4.30f1 today we still have the same errors. As this problem is not listed anywhere in the documentation of both versions, I came to the conclusion that this problem might not have anything todo with the versions themself. Anyone also experienced this and can give me a clue how to solve this? Thanks alot I'm using the version 1.8.0 of the Version Control Package.