error on web server

[Sun Oct 09 14:01:16.673801 2016] [fcgid:warn] [pid 668814:tid 140172179830528] [client 180.183.112.64:52469] mod_fcgid: stderr: PHP Notice: Undefined variable: gantry in /home/okhalalb/domains/okhalal.biz/public_html/templates/easyshop/error.php on line 15, referer: https://okhalal.biz/my-account.html
[Sun Oct 09 14:01:16.673856 2016] [fcgid:warn] [pid 668814:tid 140172179830528] [client 180.183.112.64:52469] mod_fcgid: stderr: PHP Fatal error: Call to a member function init() on null in /home/okhalalb/domains/okhalal.biz/public_html/templates/easyshop/error.php on line 15, referer: https://okhalal.biz/my-account.html

if not related to the Facebook login ,why google login no problem
only Facebook login problem

Pls help or advice
Best Regards,
Ans