Error output from Unity Console

[antennatree]

ArgumentException: Value does not fall within the expected range.
UnityEditor.Graphs.Property.ConvertFromSingleValue (System.Object o) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Property.cs:342)
UnityEditor.Graphs.Property.set_value (System.Object value) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Property.cs:221)
UnityEditor.Graphs.Property..ctor (System.String typeString, System.String name) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Property.cs:175)
UnityEditor.Graphs.Node.ConstructAndAddProperty (System.String serializedTypeString, System.String name) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Node.cs:389)
UnityEditor.Graphs.Node.AddOrModifyPropertyForSlot (UnityEditor.Graphs.Slot s) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Node.cs:418)
UnityEditor.Graphs.Node.AddSlot (UnityEditor.Graphs.Slot s, System.Int32 index) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Node.cs:199)
UnityEditor.Graphs.Node.AddSlot (UnityEditor.Graphs.Slot s) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Node.cs:188)
UnityEditor.Graphs.Node.AddInputSlot (System.String name, System.Type type) (at /Users/builduser/buildslave/unity/build/Editor/Graphs/UnityEditor.Graphs/Node.cs:170)
Klak.Wiring.Patcher.Node.PopulateSlots () (at Assets/Klak/Wiring/Editor/Patcher/Node.cs:135)
Klak.Wiring.Patcher.Node.Initialize (Klak.Wiring.NodeBase runtimeInstance) (at Assets/Klak/Wiring/Editor/Patcher/Node.cs:117)
Klak.Wiring.Patcher.Node.Create (Klak.Wiring.NodeBase runtimeInstance) (at Assets/Klak/Wiring/Editor/Patcher/Node.cs:42)
Klak.Wiring.Patcher.Graph.ForceSyncNow () (at Assets/Klak/Wiring/Editor/Patcher/Graph.cs:124)
Klak.Wiring.Patcher.Graph.SyncWithPatch () (at Assets/Klak/Wiring/Editor/Patcher/Graph.cs:81)
Klak.Wiring.Patcher.PatcherWindow.OnGUI () (at Assets/Klak/Wiring/Editor/Patcher/PatcherWindow.cs:100)
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <1f0c1ef1ad524c38bbc5536809c46b48>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <1f0c1ef1ad524c38bbc5536809c46b48>:0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at <1f0c1ef1ad524c38bbc5536809c46b48>:0)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at /Users/builduser/buildslave/unity/build/Editor/Mono/HostView.cs:345)
UnityEditor.HostView.Invoke (System.String methodName) (at /Users/builduser/buildslave/unity/build/Editor/Mono/HostView.cs:339)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition, UnityEngine.Rect viewRect) (at /Users/builduser/buildslave/unity/build/Editor/Mono/HostView.cs:315)
UnityEditor.DockArea.DrawView (UnityEngine.Rect viewRect, UnityEngine.Rect dockAreaRect, System.Boolean floatingWindow, System.Boolean isBottomTab) (at /Users/builduser/buildslave/unity/build/Editor/Mono/GUI/DockArea.cs:373)
UnityEditor.DockArea.OldOnGUI () (at /Users/builduser/buildslave/unity/build/Editor/Mono/GUI/DockArea.cs:340)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize) (at /Users/builduser/buildslave/unity/build/Modules/UIElements/IMGUIContainer.cs:278)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

[Momo the Monster]

I got these errors when trying to open the patcher using the modern Scripting Runtime Version (.NET 4.x Equivalent) and they cleared when switching to the deprecated .NET 3.5 runtime. Does this work for you?