Stripe function can’t be accessed

I’ve followed the guide for setting up the stripe subscription function, and opening the function url at /subscribe the website can’t be accessed. But executing the function manually from the console it shows a success.

TL;DR

Developers unable to access the Stripe subscription function at /subscribe on the website, but can execute it manually from the console. Domain DNS records are set correctly. Possibly missing additional settings for the function to work.