Given URL is not allowed by the Application configuration Facebook application error

Question

Given URL is not allowed by the Application configuration.: One or more of the given URLs is not allowed by the App\'s settings. It must match the Website URL or Canvas URL,

Answer 1

Michael Blackburn's answer helped me resolve my issue, but I want to give more detail on my fix.

I have a php app that posts to a user's FB page.

I own two domains:

• http://app.my-web-app.com
• http://app.mywebapp.com (no hyphen)

I built my site off the first domain because it read better IMHO (at least it did at the time).

Some users typoed the url so I bought the second one with no dashes for that reason.

So, one of my users was having the "Given URL" error.

Turns out he was going to http://app.mywebapp.com and the rest of them were going to http://app.my-web-app.com

I fixed everyone by adding all possible redirect URIs:

Granted, there are 100 better ways to implement this, but here is the workaround for now.