Steps to reproduce:
1. Create new Unity project using Universal 3D Template
2. Open Multiplayer Center window (Window > Multiplayer > Multiplayer Center)
3. Observe the Console window

Actual results: “[UI Toolkit] Could not retrieve the value at path for source type” warnings are thrown in the Console window

Expected results: No warnings are thrown in the Console window

Reproducible with versions: 7000.0.0a11 (fac09b31727f), 7000.0.0a12

Not reproducible with versions: 7000.0.0a10 (4b5f18082ea8)

Tested on (OS): macOS 27 (M1)

Notes: Editor regression

[UI Toolkit] Could not retrieve the value at path 'm_Blocks[0].Title' for source of type 'MultiplayerCenterWindow': the path from the source to the target is either invalid or contains a null value. (MultiplayerCenterWindow)
UnityEngine_CoreModule_ProxyFunctionPointers.UnityEngine_StackTraceUtility_ExtractStackTrace_UnmanagedCallers(ManagedSpanWrapper*, IntPtr)
UnityEditor.GUIView.ProcessEvent(EntityId, IntPtr, Boolean&) in /Users/bokken/build/output/unity/unity/Editor/Mono/GUIView.cs:100
UnityEditor_CoreModule_ProxyFunctionPointers.UnityEditor_GUIView_ProcessEvent_UnmanagedCallers(UInt64*, IntPtr, Byte*, IntPtr)

[UI Toolkit] Could not retrieve the value at path 'Name' for source of type 'MultiplayerCenterWindow': the path from the source to the target is either invalid or contains a null value. (MultiplayerCenterWindow)
UnityEngine_CoreModule_ProxyFunctionPointers.UnityEngine_StackTraceUtility_ExtractStackTrace_UnmanagedCallers(ManagedSpanWrapper*, IntPtr)
UnityEditor.GUIView.ProcessEvent(EntityId, IntPtr, Boolean&) in /Users/bokken/build/output/unity/unity/Editor/Mono/GUIView.cs:100
UnityEditor_CoreModule_ProxyFunctionPointers.UnityEditor_GUIView_ProcessEvent_UnmanagedCallers(UInt64*, IntPtr, Byte*, IntPtr)