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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.

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