Installation and server related problems

Hi I have just set up H5P for moodle 3.3. Upon installing Course Presentation I get the following message "Course Presentation could not be installed. Contact your administrator." When I retry the instalation seems to be a success, but when I use Course Presentation, the editor does not appear. The same happens with Interactive video. There is anly the option for :

Other content seem to be working just fine. 

Hello, thanks for your cool learning tools!

I have a few problems though:

1) Data base Requests:
An empty page on my website has 23 DB requests, however when i put one H5P Flashcard on it, the number of DB requests increases to 53; if the number of flashcards is 3, the number of requests is 87. So if I want 33 flashcards (33 Russian letters) on my page, it will be 567 Db requests.
[this issue exists in all H5P content, with makes it difficult to mass produce useful contact]

I've installed the h5p wordpress plugin and activated without problems. But if I attempt to add a new hp5 element, I get the error:

Validating h5p package failed.

This error occurs if I try to create a new project or if I attempt to upload one that was saved locally.

Worpress version: 4.8.2

PHP: 7.1