Installation and server related problems

Hello, I have a big problem with h5P under WordPress. When I click All Activities, he tells me there is no content.

If I go to Add an activity, when I click on the activity, to create one, there is a message that indicates that it is loading but it loop to infinity.

If I choose Upload, I can choose an activity previously created on another site.

It normally  loads it, tells me it's ok but the same message is displayed and nothing happens. If I go back to All H5P activities he keeps telling me that there is none.

When trying to add a video on H5P installed on Moodle, I get the following feedback:

Required parameter contentId is missing

I already increased the upload_max_filesize and post_max_size parameters.

What can it be?

Hi

I have a up to date H5P plugin installed on my wordpress (5.3) website and I'm unable to load some activities.

The Wordpress Theme I use is Twenty Eleven, it is updated as are all the plugins.

For example, when I try to load the Course Presentation activity, I get the following message:

"Échec de la validation du paquetage h5p.

Le fichier que vous avez chargé n'est pas un paquetage HTML5 valide (nous n'avons pas pu le décompresser)"