Why are these apis showing as blank?
Avatar Animations https://search.roblox.com/catalog/json?Category=12&Subcategory=38
Packages/Bundles https://search.roblox.com/catalog/json?Category=4&Subcategory=37
This is a very broad question. Are those links the final result? Are you feeding those links to an API? What do you need them for?
Anyhow, try removing the 'json' from the URL.