Is there something causing this or Is it a bug or something?
Best answer by Laura
I think if you click the Enroll button, you'll see an "audit" link. When you click it, you'll be taken to the course page where you can see the course materials in the audit mode. Then, you'll need to come back to the home page to see the "financial aid" link. Have you tried it?
This Help Article states that "while you wait for your application to be reviewed, you can begin the course immediately in audit mode or free mode. The review process may take up to 15 days".
Known technical issues, including this one, are shared in this thread: Known Technical Issues.