User Agent is: Mozilla/5.0 (Linux; Android 10; SAMSUNG SM-A215U1) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/17.0 Chrome/96.0.4664.104 Mobile Safari/537.36
Challenge: Learn HTML by Building a Cat Photo App - Step 2
I would restart the step to get the original HTML back. You should see the h1 element:
<h1>CatPhotoApp</h1>
It consists of the opening <h1> tag, the closing </h1> tag, and the text in between those tags. The h2 element is created the same way except the tag name is h2 instead of h1. So you want to create a new h2 element below the entire h1 element with the text Cat Photos.