Installation and server related problems

Hi,

I have downloaded the library interactive-video. I have made one change on it (other links should open on _top instead of _blank).

But I just can't import it as library. It shows me those messages:

I am currently trying to install the h5p-three-sixty library along with all its dependancies.

After reading looking at this documentation it shows that you are able to update content type cache on what looks to be Wordpress, however on Drupal 8 I can't seem to find it anywhere.

Does this feature exist in Drupal 8?

Chris

Does anyone know if its possible or has been able to make H5P work on a Nationbuilder website?