When I try to test login feature I receive this warning:
An error occurred during creation of a new user and login to Joomla site, please refresh the page: An active access token must be used to query information about the current user.

I have no idea what to do?

Hello,

the message 'An active access token must be used to query information about the current user' comes from Facebook and it probably means that there is some misconfiguration or invalid permissions.

Just to ensure that the problem is not related to the Facebook user used to test login, please try to perform a login in the same way on the demo site: http://demo.storejextensions.org/instantfblogin/

If it works on demo site we know that the problem is probably related to the Facebook App settings.

Greetings,

John

OK, I'vr created new FB app and it seems it is working now!

I have the same problem. When I try to login in http://demo.storejextensions.org/instantfblogin/ shows the same problem. Do you know what is the problem?

Yes we are aware of this problem due to an update in the Facebook API.
We are already working to release an update ASAP.

Updated version 2.2.3 just released to be compliant with the new Facebook API.