SourceTree crash when pushing changes

ERROR [2016-02-16 12:35:28,708] [1] [SourceTree.AppRoot] [HandleCrash] - Fatal error
System.ArgumentNullException: Exception of type 'System.ArgumentNullException' was thrown.
Parameter name: repositoryTabContainerViewModel
at System.Require.ArgumentNotNull[T](Expression`1 expression, String message)
at SourceTree.ViewModel.SubmoduleCheckDialogViewModel..ctor(Repository repo, Mode mode, List`1 outCommittedList, Action`2 completionAction, IRepositoryTabContainerViewModel repositoryTabContainerViewModel, ICustomActionsManager customActionsManager, ISchedulerManager schedulerManager, IRepositoryManager repositoryManager, IAnalyticsDataManager analyticsDataManager, ITraceManager traceManager, IDispatcher sourceTreeDispatcher, IAccountManager accountManager, IFailureHandler failureHandler, IDvcsManager dvcsManager, IRepositoryMonitorManager repositoryMonitorManager, IFileListViewManager fileListViewManager, IFileListContainerViewManager fileListContainerViewManager, IDiffViewManager diffViewManager, IChangeSetViewManager changeSetViewManager, IConfigurationManager configurationManager, IProcessDialogViewManager processDialogViewManager) in C:\projects\bitbucket.org\atlassian\sourcetreewin-prod\SourceTree.Api.UI.Wpf\ViewModel\SubmoduleCheckDialogViewModel.cs:line 111
at SourceTree.ViewModel.Git.GitPushDialogViewModel.Confirm() in C:\projects\bitbucket.org\atlassian\sourcetreewin-prod\SourceTree.Api.UI.Wpf\ViewModel\Git\GitPushDialogViewModel.cs:line 514
at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
at System.Windows.Controls.Primitives.ButtonBase.OnClick()
at System.Windows.Controls.Button.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
ERROR [2016-02-16 12:35:53,380] [1] [SourceTree.Bookmarks.BookmarkManager] [RegisterBookmarkEventHandlers] - RegisterAsRepositoryUpdatedEventHandler called with null repo
ERROR [2016-02-16 12:35:53,387] [1] [SourceTree.Bookmarks.BookmarkManager] [RegisterBookmarkEventHandlers] - RegisterAsRepositoryUpdatedEventHandler called with null repo