Hi @writedirt ! The search app above (https://bejeweled-stocking.glitch.me/) is configured for @Melyanna 's blog, so it will not work for your blog.
In order to have a search app for your blog, the search app will have to be remixed on Glitch with your blog’s credentials. I am assuming you are using it on your Write Dirt blog, so I remixed the app for you here.
Note that it will not find pinned posts, so the only post you can search for currently is the Main Blog Page post. You can clean up your pinned posts and add other posts to further test the search app.
const search = document.querySelector('a[href*="https://writedirt.com/search"]');
search.href = 'https://goofy-kiwi.glitch.me/';
Once you clean up your pinned posts, I can help make the app reflect those changes (since the pinned posts are copied & posted into the app). Hope that helps and let me know if you need anything further along the way!