Error message

• Warning: file_get_contents(https://graph.facebook.com/oauth/access_token?client_id=315808338462930&client_secret=3a58cb5fd53cfbaf7bc0509d881d8686&grant_type=client_credentials): failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request in _facebook_pull_accesstoken() (line 305 of /opt/bitnami/apache2/htdocs/sites/all/modules/facebook_pull/facebook_pull.module).
• Warning: file_get_contents(https://graph.facebook.com/48630068121/feed?&limit=10&locale=en&fields=full_picture%2Ctype%2Cmessage%2Ccreated_time%2Cfrom%2Clink%2Cdescription%2Cname): failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request in _facebook_pull_feed() (line 287 of /opt/bitnami/apache2/htdocs/sites/all/modules/facebook_pull/facebook_pull.module).