If there is an issue with a learning path you can provide this feedback to mendix support: support.mendix.com
Searching the forum is possible with the search widget in the top bar on the right:
Vote to this idea if you have the same problem. :-) https://forum.mendix.com/link/ideas/2765
I had opened a support ticket and the feedback I got was that you can report issues with Academy course by sending an email to email@example.com.
It would be fantastic to be able to report this type of things in loco, via a button of feedback widget… I’ve place this suggestion in the Ideas section of the forum here, if anyone is interested in voting it up.