The Facebook app's App Domain is set to domain.com. The Site URL is set to http://domain.com. Requests to the API from domain.com go through fine. However, requests from lvh.domain.com give the following error:
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, or the domain must be a subdomain of one of the App's domains.
What am I doing wrong? Setting the Site URL to be lvh.domain.com doesn't fix the problem either.
One peculiarity is that lvh.domain.com points to localhost and is accessed at port 8000 instead of the default http port.
(domain subbed in for actual domain)
Add lvh.domain.com to your list of App Domains. Your Site URL is fine if it's domain.com