can't load interactive psthViewer - Error using axes

[shirquinn]

matlab 2021b
psthViewer is creating just 1 figure of average firing rate, without the subplots and without interactive options
how can i get it to work?
thanks
Error using axes Invalid axes handle Error in psthViewer>psthViewerPlot (line 171) axes(myData.plotAxes(1)); Error in psthViewer>psthViewerCallback (line 331) psthViewerPlot(f) Error in psthViewer>@(f,k)psthViewerCallback(f,k) (line 83) set(f, 'KeyPressFcn', @(f,k)psthViewerCallback(f, k)); 171 axes(myData.plotAxes(1));