error uploading h5p video file
I made an interactive video with a moodle plugin. I downloaded it and tried uploading it again here, at h5p.org to edit it and use it in a different context. But I got this error message:
The H5P file could not be uploaded
An unexpected error occured. Check your server error log for more details.
The same happens the other way around, when I make an interactive video here and try to upload it in Moodle, with the plugin.
I work in firefox (65.0.1), but tried it in Chrome (61.0.3163.100) as well. I don't know the version of the plugin.
Thanks for any support you can give me!