Facebook "Can't Load URL" and doesn't show on Android

Hello,

I added a Facebook component and set its App ID. I am getting this message when trying to login with Facebook:

"Can't load URL: The domain of this URL isn't included in the app's domains. To be able to load this URL, add all domains and sub-domains of your app to the App Domains field in your app settings."

A Facebook popup shows when I call login, and it has this message. This happens on web, but on Android, Facebook OnReady didn't happen at all!

I didn't add any platforms yet in the Facebook Developer Console. I tried adding Android, but it requires extra information I don't know how to get in construct, like Class name and Key hashes.

What am I missing, please?

Thank you.

Update:

I managed to get to work in the preview mode by adding "preview.construct.net" and "construct.net" to the App Domains in Facebook Developer Console.

I still don't know if this will work when I export to Android, though. (the android phone is not available to me at the moment)..