Now that WebLab extracts hidden files on assignment import, it will also put system folders like __MACOSX at the root destination folder. At this moment, WebLab tries to find assignment-data.json in the root folder and tries to step into sub-folders as long as there is only one sub-folder. A system folder with hidden files breaks this search.
Fix: ignore __XXX folders when searching for the first assignment-data.json.

Submitted by Elmer van Chastelet on 17 September 2026 at 11:33