Most content types not showing


Overnight, most of my H5P content does not show anymore.

Content of type Memory Game still shows.

Content of type Flashcards, Dialog Cards and Question Set does not show anymore. I can still edit the content in the H5P Content screen and I see all content in the libraries. However, both in the admin mode and on the webpages these content types no longer are shown.

What is happening? Is this a local issue are an H5P issue?



Content not showing
Content types: 
BV52's picture

Hi Toon,

In order give your bug report the best chance of getting answered, please include the following information:

  1. Steps to recreate the bug
  2. Platform you're using: Drupal, Wordpress, Moodle (version number would be helpful as well)
  3. Mobile or Desktop
  4. Browser: Chrome, Firefox, Safari etc
  5. H5P plugin version
  6. H5P content type version
  7. Screenshots if it's a visual problem
  8. Please check for error logs in the browser console (Ctrl+Shift+J in Chrome)

The more information you provide, the quicker the community will be able to fix it and the quicker you'll have a working solution!


1. the bug appeared suddenly overnight. Even a back-up of 3 days ago, installed on a separate test environment shows the same problem.

See: page that does show Memory Game:

See: page that does NOT show Flash Cards:

2. I am using Wordpress 4.9.1

3. I am using a desktop

4. I use Firefox 57.0.4 (64-bits)

5. I use H5P version 1.10.0

6. I use flashcards 1.5.4

7. -

8. The bug does NOT show in Chrome and NOT in IE11 !!!!

Apparently the bug is linked to Firefox. I meanwhile also discovered that the bug must be related to the uBlock Origin extension of Firefox.

I can whitelist my pages to solve the problem locally, but how will visitors to my website that use Firefox/uBlock know that this bug exists?

Can anyone advise?



Same here.
Adblock Plus 1.13.4 + Google Chrome 63.0.3239.132.

But, if I remove "embedTypes": ["iframe"], it works.

BV52's picture

Hi everyone,

Thank you for reproting this. I am unable to reproduce the issue on my side with uBlock Origin plugin installed in Firefox. Please check if there are any error logs in the browser console (ctrl+shift+J).



Firefox reports the following error: Loading <script> from source ‘’ has failed.

 I use: Firefox 57.0.4 (64-bits) with uBlock Origin v1.14.24




icc's picture

EasyList has fixed this in 9557d76. This should no longer be an issue.


I am still facing the same problem, do I need to install something on my website to activate the Easylist solution?


icc's picture

This is purely a browser issue, no action is required on the website. You could try clearing the browser cache using Ctrl+Shift+Delete or if that doesn't work try to remove the extension and then reinstall it.