im using unity 2022.3.22f1
the sdk version is 3.8.0
but i tested with 3.7.6 and it still did the same thing
below is the console full message
ArgumentNullException: Value cannot be null.
Parameter name: styleSheet
UnityEngine.UIElements.VisualElementStyleSheetSet.Add (UnityEngine.UIElements.StyleSheet styleSheet) (at <332857d8803a4878904bcf8f9581ec33>:0)
VRC.SDKBase.Editor.Elements.StepFoldout..ctor () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/Elements/StepFoldout/StepFoldout.cs:49)
System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) (at <27124aa0e30a41659b903b822b959bc7>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) (at <27124aa0e30a41659b903b822b959bc7>:0)
System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic, System.Boolean wrapExceptions) (at <27124aa0e30a41659b903b822b959bc7>:0)
System.RuntimeType.CreateInstanceSlow (System.Boolean publicOnly, System.Boolean wrapExceptions, System.Boolean skipCheckThis, System.Boolean fillCache) (at <27124aa0e30a41659b903b822b959bc7>:0)
System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Boolean wrapExceptions, System.Threading.StackCrawlMark& stackMark) (at <27124aa0e30a41659b903b822b959bc7>:0)
System.Activator.CreateInstance[T] () (at <27124aa0e30a41659b903b822b959bc7>:0)
UnityEngine.UIElements.UxmlFactory`2[TCreatedType,TTraits].Create (UnityEngine.UIElements.IUxmlAttributes bag, UnityEngine.UIElements.CreationContext cc) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.VisualTreeAsset.Create (UnityEngine.UIElements.VisualElementAsset asset, UnityEngine.UIElements.CreationContext ctx) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.VisualTreeAsset.CloneSetupRecursively (UnityEngine.UIElements.VisualElementAsset root, System.Collections.Generic.Dictionary`2[TKey,TValue] idToChildren, UnityEngine.UIElements.CreationContext context) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.VisualTreeAsset.CloneSetupRecursively (UnityEngine.UIElements.VisualElementAsset root, System.Collections.Generic.Dictionary`2[TKey,TValue] idToChildren, UnityEngine.UIElements.CreationContext context) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.VisualTreeAsset.CloneSetupRecursively (UnityEngine.UIElements.VisualElementAsset root, System.Collections.Generic.Dictionary`2[TKey,TValue] idToChildren, UnityEngine.UIElements.CreationContext context) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.VisualTreeAsset.CloneTree (UnityEngine.UIElements.VisualElement target, System.Collections.Generic.Dictionary`2[TKey,TValue] slotInsertionPoints, System.Collections.Generic.List`1[T] attributeOverrides) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.VisualTreeAsset.CloneTree (UnityEngine.UIElements.VisualElement target, System.Int32& firstElementIndex, System.Int32& elementAddedCount) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.VisualTreeAsset.CloneTree (UnityEngine.UIElements.VisualElement target) (at <332857d8803a4878904bcf8f9581ec33>:0)
VRCSdkControlPanel.ShowBuilders () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/ControlPanel/VRCSdkControlPanelBuilder.cs:634)
VRCSdkControlPanel.RenderTabs () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/ControlPanel/VRCSdkControlPanel.cs:431)
VRCSdkControlPanel.SelectTab (VRCSdkControlPanel+PanelTab tab) (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/ControlPanel/VRCSdkControlPanel.cs:403)
VRCSdkControlPanel+<>c__DisplayClass43_0.<CreateTabs>b__0 () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/ControlPanel/VRCSdkControlPanel.cs:390)
UnityEngine.UIElements.Clickable.Invoke (UnityEngine.UIElements.EventBase evt) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.Clickable.ProcessUpEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.Vector2 localPosition, System.Int32 pointerId) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.Clickable.OnMouseUp (UnityEngine.UIElements.MouseUpEvent evt) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventCallbackFunctor`1[TEventType].Invoke (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.PropagationPhase propagationPhase) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventCallbackRegistry.InvokeCallbacks (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.PropagationPhase propagationPhase) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEvent (UnityEngine.UIElements.EventBase evt) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEventAtCurrentTargetAndPhase (UnityEngine.UIElements.EventBase evt) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.CallbackEventHandler.HandleEventAtTargetPhase (UnityEngine.UIElements.EventBase evt) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.MouseCaptureDispatchingStrategy.DispatchEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventDispatcher.ApplyDispatchingStrategies (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel, System.Boolean imguiEventIsInitiallyUsed) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEventQueue () (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventDispatcher.OpenGate () (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventDispatcherGate.Dispose () (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.EventDispatcher.Dispatch (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel, UnityEngine.UIElements.DispatchMode dispatchMode) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.BaseVisualElementPanel.SendEvent (UnityEngine.UIElements.EventBase e, UnityEngine.UIElements.DispatchMode dispatchMode) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& eventHandled) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.UIEventRegistration.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.UIElements.UIEventRegistration+<>c.<.cctor>b__1_2 (System.Int32 i, System.IntPtr ptr) (at <332857d8803a4878904bcf8f9581ec33>:0)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& result) (at <74d6aaa3aedf4a279751914e170fef65>:0)