H5p library and all contents don't display in Admin area and navigation bar of my WordPress site

Hello, I just noticed that H5P contents disappeared from the Admin area and navigation bar, all these contents can be shown up in the front-end, but in the admin area, they are invisible. even this page /wp-admin/admin.php?page=h5p is inaccessible to any roles who are permitted to access the admin. I have switched the theme to twenty-twenty and deactivated all plugins, H5p contents are still invisible.

Many files and duplication


The problem I encountered is.

I'm running Drupal 9.3.6. in the H5P 2.0.0-alpha2 environment.

What I experience is that when H5P editing, a lot of temp files and single files are created. On the server, it fills up the storage space.

#du -shc /var/www/clients/client1/web20/web/sites/default/files/h5p/*

63G     /var/www/clients/client1/web20/web/sites/default/files/h5p/content

6.2M    /var/www/clients/client1/web20/web/sites/default/files/h5p/editor