Opening gallery in grid view script is not working anymore

I discovered that my galleries with a custom script to open them in grid view stopped working. I'm not sure what's going on, but I think squarespace my have something to do with the problem I am having. I provided the script below , any help would be great

<script>    
  Y.use('node', function() {
    Y.on('domready', function() {

      // Show gallery index by default for Momentum template.
      Momentum.ProjectIndex.init();
      Momentum.ProjectIndex.show();

    });
  });
</script>