plugin H5P in moodle 3.3 give a "error: enable to load libraries"


I'm trying to install the plugin for mooodle (I have 3,3 version), all seem went well, but when I try to make an activitie in H5P, I get the "error: enable to load libraries". I disinstalled and reinstalled (more time, also in manual mode), in the end I activated the developer mode, here my report, sorry my moodle is in Italian (also my english is a bit in Italian ;-) )