System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
---> System.ArgumentNullException: Value cannot be null. (Parameter 'key')
at System.Collections.Generic.Dictionary`2.FindValue(TKey key)
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at Pinta.Actions.SaveDocumentImplmentationAction.SaveFileAs(Document document) in D:\a\Pinta\Pinta\Pinta\Actions\File\SaveDocumentImplementationAction.cs:line 126
at Pinta.Actions.SaveDocumentImplmentationAction.Activated(Object sender, DocumentCancelEventArgs e) in D:\a\Pinta\Pinta\Pinta\Actions\File\SaveDocumentImplementationAction.cs:line 56
at Pinta.Core.FileActions.RaiseSaveDocument(Document document, Boolean saveAs) in D:\a\Pinta\Pinta\Pinta.Core\Actions\FileActions.cs:line 119
at Pinta.Core.Document.Save(Boolean saveAs) in D:\a\Pinta\Pinta\Pinta.Core\Classes\Document.cs:line 394
at Pinta.Actions.SaveDocumentAsAction.Activated(Object sender, EventArgs e) in D:\a\Pinta\Pinta\Pinta\Actions\File\SaveDocumentAsAction.cs:line 48
at InvokeStub_ActivatedHandler.Invoke(Object, Object, IntPtr*)
at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
--- End of inner exception stack trace ---
at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at GLib.Signal.ClosureInvokedCB(Object o, ClosureInvokedArgs args)
at GLib.SignalClosure.MarshalCallback(IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data)
