Upload h5p file to WordPress fails
when I select "Libraries" in the H5P menu and try to upload a .h5p file from my computer to WordPress, it seems this does not work, because no content available afterwards.
I am sure the .h5p is correct, since I have that in use on the h5p.org site already.
I have traced WordPress, but nothing in the logfile whatever.
Also I read a few forum threads about similar problems, but could not find a solution.