Fatal error: Uncaught Facebook\FacebookSDKException: You must provide or set a default application id. in /home/www/testmall.haloh.net/system/sg_social_lib/facebook/src/Facebook/FacebookSession.php:320 Stack trace: #0 /home/www/testmall.haloh.net/system/sg_social_lib/facebook/src/Facebook/FacebookRedirectLoginHelper.php(75): Facebook\FacebookSession::_getTargetAppId(NULL) #1 /home/www/testmall.haloh.net/catalog/controller/sgsociallogin/facebook.php(71): Facebook\FacebookRedirectLoginHelper->__construct('https://testmal...') #2 /home/www/testmall.haloh.net/system/storage4/modification/system/engine/action.php(79): ControllerSgsocialloginFacebook->index() #3 /home/www/testmall.haloh.net/catalog/controller/startup/router.php(25): Action->execute(Object(Registry)) #4 /home/www/testmall.haloh.net/system/storage4/modification/system/engine/action.php(79): ControllerStartupRouter->index() #5 /home/www/testmall.haloh.net/system/engine/router.php(67): Action->execute(Object(Registry)) #6 /home/www/testmall.haloh.net/system/engine/ in /home/www/testmall.haloh.net/system/sg_social_lib/facebook/src/Facebook/FacebookSession.php on line 320