Hello @creynders ...
Can you please double-check to see if you have any prerequisites or requirements set for that module that would be preventing students from accessing that assignment?
- How do I lock a module?
- How do I add prerequisites to a module?
- How do I add requirements to a module?
Please let us know if any of these resources were of help to you, Cindy. If so, please click the "Mark Correct" button next to this response...otherwise, let us know how we can be of further assistance. Thanks!