Installation and server related problems

Hi,

I am trying to install H5P on my Drupal, I've downloaded the file from here, and when I upload it to my Drupal, I get:

h5p-8.x-1.0-rc18.tar.gz contains versions of modules or themes that are not compatible with Drupal 9.1.9

I have also tried with 7.x-1.48, but in that case I get this another error:

Hi folk,

I am having a lot of 403 (server not found) errors when updating content (it is a large presentation).

Is there any serer adjusments I could do to fix this?

Thanks,
Paul

Our team created several objects with H5P in Moodle, then downloaded them from there and uploaded them to our H5P-enabled Wordpress site so more than one people could work on each at a time (Moodle doesn't allow editing of another instructor's objects, it seems).