Hi Emmanuelle,
I checked this with Jose and the package hasn't been changed since .LRN 2.3.1.
After reviewing the bug with Jose and some debugging, we noticed this was due to a change in content::folder::new, where now the default parent_id for the folder is the security_context_root instead of the root_folder, as it used to be up to 5-3.
We have changed the proc in IMS-LD in order to work with this and would be able to submit the patch or commit the change in order to include it in .LRN 2.4.0.