Exception: Required "app_id" key not supplied in config and could not find fallback environment variable "FACEBOOK_APP_ID"
Stack trace: #0 /usr/www/users/paydad/modules/social-signup/facebook/login/category.php(5): Facebook\Facebook->__construct(Array) #1 /usr/www/users/paydad/library/classes/module.class.php(173): include('/usr/www/users/...') #2 /usr/www/users/paydad/index.php(16): module->incl('social-signup/f...') #3 {main}
Thrown in: /usr/www/users/paydad/library/vendor/Facebook/Facebook.php on line 139