Errors spam the console and sometimes the Editor freezes when trying to edit Build Location fields in the Addressable Profiles window.

Repro steps:
- download this small project or create a new project
- make sure the eaddresables apckage is intalled
- open the Addresables Settings and the Addresables Profiles windows
- try to edit and copy-paste the Default Profile fields: LocalLoadPath, LocalBuildPath, BuildTarget etc
- one of 2 things may happen: either the editor will freeze completely or there will be lots of erros in the console.

Reproducible with Unity 2019.4.19f1, 2019.4.18f1, 2020.2.3f1 , 2021.1.0b4, 2021.2.0a3 and 2019.3
Seems to be more of a n issue which Addressable package is used:
reproducible with 1.16.16, 1.16.1
cannot repro with 1.15.1.

The errors i get:

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.AddressableAssets.Settings.GroupSchemas.BundledAssetGroupSchema.get_HostingServicesContentRoot () (at Library/PackageCache/com.unity.addressables@1.16.16/Editor/Settings/GroupSchemas/BundledAssetGroupSchema.cs:423)
UnityEditor.AddressableAssets.HostingServices.HostingServicesManager.GetAllContentRoots () (at Library/PackageCache/com.unity.addressables@1.16.16/Editor/HostingServices/HostingServicesManager.cs:428)
UnityEditor.AddressableAssets.HostingServices.HostingServicesManager.ConfigureAllHostingServices () (at Library/PackageCache/com.unity.addressables@1.16.16/Editor/HostingServices/HostingServicesManager.cs:405)
UnityEditor.AddressableAssets.HostingServices.HostingServicesManager.OnSettingsModification (UnityEditor.AddressableAssets.Settings.AddressableAssetSettings s, UnityEditor.AddressableAssets.Settings.AddressableAssetSettings+ModificationEvent evt, System.Object obj) (at Library/PackageCache/com.unity.addressables@1.16.16/Editor/HostingServices/HostingServicesManager.cs:398)
UnityEditor.AddressableAssets.Settings.AddressableAssetSettings.SetDirty (UnityEditor.AddressableAssets.Settings.AddressableAssetSettings+ModificationEvent modificationEvent, System.Object eventData, System.Boolean postEvent, System.Boolean settingsModified) (at Library/PackageCache/com.unity.addressables@1.16.16/Editor/Settings/AddressableAssetSettings.cs:1356)
UnityEditor.AddressableAssets.GUI.AddressableAssetSettingsInspector.OnInspectorGUI () (at Library/PackageCache/com.unity.addressables@1.16.16/Editor/GUI/AddressableAssetSettingsInspector.cs:246)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass58_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <bef6d2fbef1348939b77102b4cf6a6e6>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

ArgumentException: Getting control 3's position in a group with only 3 controls when doing repaint
Aborting
UnityEngine.GUILayoutGroup.GetNext () (at <fe7ee1881b524b0d9443f74417fb598b>:0)
UnityEngine.GUILayoutUtility.BeginLayoutArea (UnityEngine.GUIStyle style, System.Type layoutType) (at <fe7ee1881b524b0d9443f74417fb598b>:0)
UnityEngine.GUILayoutUtility.DoBeginLayoutArea (UnityEngine.GUIStyle style, System.Type layoutType) (at <fe7ee1881b524b0d9443f74417fb598b>:0)
UnityEditor.EditorGUILayoutUtilityInternal.BeginLayoutArea (UnityEngine.GUIStyle style, System.Type LayoutType) (at <bef6d2fbef1348939b77102b4cf6a6e6>:0)
UnityEditor.HostView.BeginOffsetArea (UnityEngine.Rect screenRect, UnityEngine.GUIContent content, UnityEngine.GUIStyle style) (at <bef6d2fbef1348939b77102b4cf6a6e6>:0)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition, UnityEngine.Rect viewRect) (at <bef6d2fbef1348939b77102b4cf6a6e6>:0)
UnityEditor.DockArea.DrawView (UnityEngine.Rect viewRect, UnityEngine.Rect dockAreaRect) (at <bef6d2fbef1348939b77102b4cf6a6e6>:0)
UnityEditor.DockArea.OldOnGUI () (at <bef6d2fbef1348939b77102b4cf6a6e6>:0)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <06214b245dbb4d10a9cefd10639bb04e>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, UnityEngine.Matrix4x4 worldTransform, UnityEngine.Rect clippingRect, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <06214b245dbb4d10a9cefd10639bb04e>:0)
UnityEngine.UIElements.IMGUIContainer.DoIMGUIRepaint () (at <06214b245dbb4d10a9cefd10639bb04e>:0)
UnityEngine.UIElements.UIR.RenderChainCommand.ExecuteNonDrawMesh (UnityEngine.UIElements.UIR.DrawParams drawParams, System.Boolean straightY, System.Single pixelsPerPoint, System.Exception& immediateException) (at <06214b245dbb4d10a9cefd10639bb04e>:0)