Hello Bach Phham,
thanks for your quick reply. I checked everything (i did this successfully with several sites before with your great software). App ID and Secret are correct, app domain and site url in facebook app settings are correct. But connection to facebook from joomla backend keeps showing this error. Domain ist not there... any ideas? I tried new installation of joautofacebook and a new app in facebook, no success.
Is it API-Version 2.10? On a different site where it works, there is 2.9.... ??