Click an image to open the full screen Pro Lightbox. Once open, resize browser to see responsiveness. Also try captions, commenting, social sharing. Note the Pro Lightbox can be enabled for any gallery, not just Masonry.

Default Gallery Type Template

This is the default gallery type template, located in:
/is/htdocs/wp11228992_S730LP3F0N/www/pension-martinus/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_gallery_display/templates/index.php.

If you're seeing this, it's because the gallery type you selected has not provided a template of it's own.