I try to fix an issue but could not manage. It is an error with the element {{thumb}} and special signs {{…}}: Failed to load resource: the server responded with a status of 404. What is wrong with the code as it should be without an error. As I understand I have put {literal} in the correct way. It is strange they use characters reserved for a server-side programming.
When I set Flickr API and connect image to the gallery, it will be an error with the thumb images:
{literal}
<img src="style/blank.gif" data-src="{{image}}" alt="{{title}}"/>
<img class="ms-thumb" src="{{thumb}}" alt="{{title}}"/>
{/literal}
{literal}
{{title}}<br />
{{description}}<br />
by:{{owner-name}} <br />
{/literal}