Web visualizer Ergo Jr

Hi,
I try to use your web visualizer, no problem with (visualizer + Python) and (visualizer + Snap! with the command : poppy-services --poppy-simu --snap poppy-ergo-jr,)
But I can not connect (Viewer + Snap!) When I click on the button “Ouvrir l’éditeur Snap!” on this page
Thank you

The button “Ouvrir l’éditeur Snap!” is only a vanilla Snap!, you still need to load Poppy blocks and start poppy-services --poppy-simu --snap poppy-ergo-jr… So I’m not sure to understand what does not work.