Why is my GitHub OAuth redirect URL not working and resulting in a 404?

[gavriel-adi]

Hi everyone,

I'm trying to set up GitHub OAuth for my application, but I'm running into an issue where the redirect URL doesn't work and results in a 404 error.

Here is the URL I'm using for the authorization step:
https://github.com/login/oauth/authorize?client_id=Ov23liyXRgGw8EjB8rbA&scope=user&redirect_uri=https://eaa9-2-52-79-19.ngrok-free.app/functions/quick_login.php&state=github

What I’ve already checked:

1. The client_id is correctly copied from my OAuth app settings.
2. The redirect_uri matches the Callback URL configured in my OAuth app: https://eaa9-2-52-79-19.ngrok-free.app/functions/quick_login.php.
3. I've verified that the URL is properly formatted, and the scope and state parameters are included.

Problem:

• When I use this URL, I am redirected to a 404 page instead of the GitHub authorization screen.
• I've attached screenshots of the error page and my OAuth app configuration for reference.

Questions:

1. Is there something wrong with my redirect_uri or other parameters in the URL?
2. Are there any specific rules for using subdomains (like ngrok-free.app) that I might be missing?
3. Could there be an issue with my environment (e.g., ngrok or my server)?

Any help or insights would be greatly appreciated!