just to inform you – a friend of mine helped me out of this, everything is working fine now.
@kchoih5p – this error message appears when trying to do the provided update ind the admin panel.
@otacke – from my point of view there heven’t been made any changes to the permissions.
I have to say that since the last update nearly everything went wrong with that plugin, f.e. some h5p types stopped working. A friend of mine did a quick fix then…
is someone here using H5P in WP and has an idea how to use it that it makes sense?