PHP error in config screen

Hi.

In the bottom of the config screen, I have this error message :

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'hn_fbog_configuration' not found or invalid function name in /home/XXXXX/blog/wp-includes/plugin.php on line 470

Any idea ?

And no “og :” tag :/

https://wordpress.org/plugins/hobbynote-facebook-open-graph/