If you look at the console, we can see there is an error related to “Content Security Policy” which avoid loading google captcha script :
Based on this answer there is no easy way to disable “Content Security Policy” in Chrome except by using an extension.
Such an extension is available here : Disable Content Security Policy [Google Chrome extension]
Once the extension is active, the instagram form loads without errors and should look like this :
For security reason I highly recommend to uninstall the extension once the app is created.