[SOLVED] CB Connect Log in / Register error

Hi, I have an issue where if a user is not already logged into facebook I get the following error message rather than a facebook log in request :

An error occurred with FPHFB1. Please try again later.

API Error Code: 191
API Error Description: The specified URL is not owned by the application
Error Message: Invalid redirect_uri: Given URL is not allowed by the Application configuration

However, if a user is already logged into facebook, then login/registration occurs normally.

Also sometimes I get a different error message too - I can't reproduce it at the moment, but I think it just returns the error message without the API details.

You're trying to use Facebook on a URL that you did not configure it for. For example if you configured it fro example.com then it will not work on www.example.com as www. Please review your Facebook Applications configuration closely and ensure you're navigating to the proper URL. Facebook is very strict regarding domain matching.

Thanks, but which am I supposed to use?

"example.com"

or

" www.example.com "?

I have no subdomains etc. Joomla is the only installation on the server

Ok, so I see what's happening now.

As long as I (or any visitor to the site) accesses my site via " www.example.com " instead of "example.com" it works fine.

So how do I configure it to work properly if someone happens to navigate via the shortened "example.com"?

This is going to turn people away from my site if they've landed on it via a link without the "www" and they can't do the whole one click register and get an error message instead.

You use whichever your site is primarily designed for. You maybe also able to add extra URLs to be authorized (I know Twitter can do this) or by adding "example.com" domain to the authorized domain setting.

"www" is a subdomain; so it means the two urls www.example.com and example.com are not the same. It somehow became popular to append www. to every URL when technically it shouldn't.

The best approach however is to just add a redirect from 1 to the other. Normally this can be done from your hosting panel (cPanel can do it) or a redirect in htaccess. This will ensure they always go to example.com for example.

Thank you so much krileon. Very much appreciated. I think I have enough to go on now to sort this out completely.