Reproduction steps:
1. Open the attached project "CrashRepro"

Expected result: Project opens
Actual result: Editor crashes

Reproducible with: 6000.0.23f1, 6000.0.31f1, 6000.1.0a8
Not reproducible with: 2021.3.47f1, 2022.3.55f1, 6000.0.22f1

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note: When opened with Unity 6 versions 6000.0.23f1 and below the scene view window is black and the editor becomes very slow

This message is logged repeatedly:

{noformat}ArgumentException: JSON parse error: Missing a closing quotation mark in string.
at (wrapper managed-to-native) UnityEditor.EditorJsonUtility.FromJsonOverwriteInternal_Injected(UnityEngine.Bindings.ManagedSpanWrapper&,object)
at UnityEditor.EditorJsonUtility.FromJsonOverwriteInternal (System.String json, System.Object objectToOverwrite) [0x00048] in <1f8babe234e540299e4f7387cdc20cd8>:0
at UnityEditor.EditorJsonUtility.FromJsonOverwrite (System.String json, System.Object objectToOverwrite) [0x0003b] in <1f8babe234e540299e4f7387cdc20cd8>:0
at UnityEditor.Overlays.OverlayCanvas.RestoreOverlay (UnityEditor.Overlays.Overlay overlay, UnityEditor.Overlays.SaveData data) [0x00028] in <1f8babe234e540299e4f7387cdc20cd8>:0
at UnityEditor.Overlays.OverlayCanvas.RestoreOverlays () [0x000ef] in <1f8babe234e540299e4f7387cdc20cd8>:0
at UnityEditor.Overlays.OverlayCanvas.Initialize (UnityEditor.EditorWindow window) [0x0015b] in <1f8babe234e540299e4f7387cdc20cd8>:0
at UnityEditor.EditorWindow.get_rootVisualElement () [0x0003c] in <1f8babe234e540299e4f7387cdc20cd8>:0
at UnityEditor.UIElements.DefaultEditorWindowBackend.SendInitializeIfNecessary (System.Boolean duringOnCreate) [0x0002e] in <a12e60819876493089f1412d29525d7a>:0
at UnityEditor.UIElements.DefaultEditorWindowBackend.RegisterWindow (System.Boolean duringOnCreate) [0x00162] in <a12e60819876493089f1412d29525d7a>:0
at UnityEditor.UIElements.DefaultEditorWindowBackend.OnCreate (UnityEditor.IWindowModel model) [0x000d6] in <a12e60819876493089f1412d29525d7a>:0
UnityEngine.DebugLogHandler:Internal_LogException_Injected(Exception, IntPtr)
UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
UnityEngine.Logger:LogException(Exception, Object)
UnityEngine.Debug:LogException(Exception)
UnityEditor.UIElements.DefaultEditorWindowBackend:OnCreate(IWindowModel)
UnityEditor.GUIView:set_windowBackend(IWindowBackend)
UnityEditor.GUIView:OnEnable()
UnityEditor.HostView:OnEnable()
UnityEditor.DockArea:OnEnable()
UnityEditorInternal.InternalEditorUtility:LoadSerializedFileAndForget_Injected(ManagedSpanWrapper&)
UnityEditorInternal.InternalEditorUtility:LoadSerializedFileAndForget(String)
UnityEditor.WindowLayout:LoadWindowLayout(String, LoadWindowLayoutFlags)
UnityEditor.WindowLayout:LoadWindowLayout(String, Boolean, Boolean, Boolean, Boolean)
UnityEditor.WindowLayout:LoadLastUsedLayoutForCurrentMode(Boolean)
UnityEditor.WindowLayout:LoadCurrentModeLayout(Boolean)
UnityEditor.WindowLayout:LoadDefaultWindowPreferences(){noformat}

Please note the comment below. There's also a Burst crash in the Editor log, but I think the JSON parse error should be addressed first.