Failed to load resource, Loading, please wait, add content

I am also experiencing the same issue:

Drupal 9.4.13
PHP 8.0.27
Version: 2.0.0-alpha3

Using the Opigno distribution, when I go to add a new Question Set OR when I try to load an existing Question Set I get the following Errors in the console:

GET https://libraries/H5PEditor.TableList-1.0/h5p-editor-table-list.css?ver=... net::ERR_NAME_NOT_RESOLVED
GET https://libraries/H5PEditor.RangeList-1.0/h5p-editor-range-list.css?ver=... net::ERR_NAME_NOT_RESOLVED
GET https://libraries/H5PEditor.ShowWhen-1.0/h5p-show-when.css?ver=1.0.9 net::ERR_NAME_NOT_RESOLVED
GET https://libraries/FontAwesome-4.5/h5p-font-awesome.min.css?ver=4.5.4 net::ERR_NAME_NOT_RESOLVED
GET https://libraries/H5PEditor.VerticalTabs-1.3/styles/css/vertical-tabs.cs... net::ERR_NAME_NOT_RESOLVED
GET https://libraries/H5PEditor.QuestionSetTextualEditor-1.3/dist/question-s... net::ERR_NAME_NOT_RESOLVED

The functionality for the call is here:
/modules/contrib/h5p/vendor/h5p/h5p-editor/scripts/h5peditor.js

This is where the code seems to have issues:

ns.libraryRequested = function (libraryName, callback) {
  var libraryData = ns.libraryCache[libraryName];

  if (!ns.libraryLoaded[libraryName]) {
    // Add CSS.
    if (libraryData.css !== undefined) {
      libraryData.css.forEach(function (path) {
        if (!H5P.cssLoaded(path)) {
          H5PIntegration.loadedCss.push(path);
          if (path) {
            ns.$('head').append('<link ' +
              'rel="stylesheet" ' +
              'href="' + path + '" ' +
              'type="text/css" ' +
              '/>');
          }
        }
      });
    }

    // Add JS
    var loadingJs = false;
    if (libraryData.javascript !== undefined && libraryData.javascript.length) {
      libraryData.javascript.forEach(function (path) {
        if (!H5P.jsLoaded(path)) {
          loadingJs = true;
          ns.loadJs(path, function (err) {
            if (err) {
              console.error('Error while loading script', err);
              return;
            }

The libraryData.css & libraryData.javascript for me is the following:
[
"//libraries/H5PEditor.TableList-1.0/h5p-editor-table-list.css?ver=1.0.4",
"//libraries/H5PEditor.RangeList-1.0/h5p-editor-range-list.css?ver=1.0.12",
"//libraries/H5PEditor.ShowWhen-1.0/h5p-show-when.css?ver=1.0.9",
"//libraries/FontAwesome-4.5/h5p-font-awesome.min.css?ver=4.5.4",
"//libraries/H5PEditor.VerticalTabs-1.3/styles/css/vertical-tabs.css?ver=1.3.9"
]
[
"//libraries/H5PEditor.QuestionSetTextualEditor-1.3/dist/question-set-textual-editor.js?ver=1.3.8",
"//libraries/H5PEditor.TableList-1.0/h5p-editor-table-list.js?ver=1.0.4",
"//libraries/H5PEditor.RangeList-1.0/h5p-editor-range-list.js?ver=1.0.12",
"//libraries/H5PEditor.ShowWhen-1.0/h5p-show-when.js?ver=1.0.9",
"//libraries/H5PEditor.VerticalTabs-1.3/vertical-tabs.js?ver=1.3.9",
"//libraries/H5P.QuestionSet-1.17/presave.js?ver=1.17.1"
]

1. The libraryData.css.forEach && libraryData.javascript.forEach is looping through each of these index's
2. The function H5P.cssLoaded(path) && H5P.jsLoaded(path) (found in web/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js) determines the position of an element in the array (it would return 0-5, and 0-4 respectfully)
3. The function ns.loadJs (found in web/modules/contrib/h5p/vendor/h5p/h5p-editor/scripts/h5peditor.js) takes in the index we are at in the array, and is creating a new script element.

My Analysis:
I believe the ns.loadJs is where our issue occurs.

I am not sure why.

Same issue on alpha3 version.

I see that patch #11 doesn't works over h5p works, looks that works for a some distribution.

this patch is for h5p 2.0.0 branch

Using Drupal 11 and the latest 2.0.0-alpha6 module, I don't have this issue. In this version at least, this patch doesn't really make sense to me. The order of the params in the current module matches the order expected in the H5P core editor's getLibraryData() function. Changing them breaks the loading of the H5P libraries. It seems like this has either been fixed or perhaps it only happened with the Opigno distribution?