Investigate why nuxeo-ui-elements are not listed in webcomponents.org

Steps to reproduce:

• On the page for nuxeo-ui-elements on webcomponents.org.
• Select any version before v2.4.52 and after 2.4.46.
• Notice how the element list is not filled on the left side, where there's a never ending spinner.
• Select any other version outside of that interval.
• Notice how the elements are now listed on the left side.

Notes:

• Checking on the browser devtools console, it seems that there's a problem with the endpoint that is used to get the elements' analysis. Working example. Problematic example.