Unable to find constructor for: H5P.Blanks 1.12

Problem/Motivation

On a D8 Opigno install, the Fill in the Blank answer type will not display. It can be edited normally, but when loading for an end user, we get the following error:

Uncaught TypeError: can't access property "prototype", Question is undefined
    Blanks http://XXXX/sites/default/files/h5p/libraries/H5P.Blanks-1.12/js/blanks.js?quqylu:123
    <anonymous> http://XXXX/sites/default/files/h5p/libraries/H5P.Blanks-1.12/js/blanks.js?quqylu:924
blanks.js:123:3
Uncaught TypeError: can't access property "Cloze", Blanks is undefined
    <anonymous> http://XXXX/sites/default/files/h5p/libraries/H5P.Blanks-1.12/js/cloze.js?quqylu:17
    <anonymous> http://XXXX/sites/default/files/h5p/libraries/H5P.Blanks-1.12/js/cloze.js?quqylu:231
cloze.js:17:3
Unable to find constructor for: H5P.Blanks 1.12 h5p.js:976:13
    error http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:976
    newRunnable http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:895
    init http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:137
    jQuery 2
    init http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:93
    <anonymous> http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:2821
    jQuery 11
Uncaught TypeError: can't access property "getCopyrights", instance is undefined
    getCopyrights http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:1115
    init http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:174
    jQuery 2
    init http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:93
    <anonymous> http://XXXX/modules/contrib/h5p/vendor/h5p/h5p-core/js/h5p.js?v=1.0:2821
    jQuery 11

Steps to reproduce

• Install Opingo
• Add a Fill in the Blank activity
• Add activity to a module
• Try to load the activity

The activity never loads, and the Loading spinner never stops.

The error seems similar to the one for a different H5P component: https://www.drupal.org/project/h5p/issues/3169008 →

The remedy there to turn off JS aggregation did not help here.