Fatal error: Uncaught Error: Using $this when not in object context in /nfs/c05/h03/mnt/77061/domains/voogla.com/html/application/models/user.php:132 Stack trace: #0 /nfs/c05/h03/mnt/77061/domains/voogla.com/html/application/controllers/referrals.php(67): User::check_ref_link(false) #1 /nfs/c05/h03/mnt/77061/domains/voogla.com/html/system/core/CodeIgniter.php(359): Referrals->index() #2 /nfs/c05/h03/mnt/77061/domains/voogla.com/html/index.php(202): require_once('/nfs/c05/h03/mn...') #3 {main} thrown in /nfs/c05/h03/mnt/77061/domains/voogla.com/html/application/models/user.php on line 132