Hi Gary,
We’d love to help. It would be easiest for us to do so if you’d provide the following information:
Link to your project: click the “Share” button at the top of the page and paste the link it produces into your post.
Are there any particular steps that cause the error?
What did it do instead?
It’s hard to debug without seeing the student’s code and error message. If you can’t share their code, a screenshot at the very least would go a long way toward helping.