Introduction to HTML5 Elements - main tag issue?

Tell us what’s happening:
I have all my main tags in the right place, but I keep getting told to put “a closing main tag after the second closing paragraph tag.” Which is what I’ve done clearly. Am I doing something wrong?

Your code so far

<p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
<P>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</P> 

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36.

Link to the challenge:

yes unfortunately. You have to be careful with capital letters. the above p closing tag is incorrect

Wow, thank you! I was getting a bit frustrated, and I kept redoing the code over and over again. I guess I must’ve missed something about capitalization earlier in the lesson.

to be frank, I’m not sure if CSS is actually case-sensitive or not, but the code checking tool is obviously sensitive to that.