New Content type

Hello, I need you to guide me because I have not been able to solve the issue, I have investigated in documents and not found the answer, I am working on localhost, to present content, I have all the h5p plugins that I found installed in moodle, and when I do the activity and I try to call it to show it, I get this error, can someone tell me what happens? I would like to generate content without using the iframe of h5p.org but something more native to the platform, is there any way or it depends on the server and iframes external, thank you!

Moodle 3.9.6+

Hello all,
as part of my bachelor thesis I am working on the content type H5P.RealityBox.
It should make it possible to integrate 3D models into learning environments, which can also be viewed on VR headsets and Google Cardboard using WebXR.

The corresponding github repositories can be found here:

Hello everyone,
I am currently working on a WebXR library and would like to allow the upload of different 3D mesh data in the editor.

I have to add the desired file extension to the PHP constant $defaultContentWhitelist, but the return of the function getWhitelist() does not change.
And so the new file type is still not accepted in the editor.

Do I have to make changes somewhere else?

I am using for development Drupal 7 in combination with the development folder.

Many thanks
gwulf