Talking about bad error messages

I missed the regular enrollment period for courses starting in 2 weeks, but I did have late enrollment days, which I remembered.
When wanting to late enroll, I was greeted with th error message in the picture. Bad news first, good news later I guess

As you can imagine, my heart skipped a beat. Nonetheless, it was all good in the end, because I was already enrolled for the compulsory courses I wanted to take