Fatal error: Uncaught Error: Interface 'PHPExcel_IComparable' not found in /home/pssmiet1/public_html/nmcce.pssm.in/Classes/PHPExcel/Style/Conditional.php:36 Stack trace: #0 {main} thrown in /home/pssmiet1/public_html/nmcce.pssm.in/Classes/PHPExcel/Style/Conditional.php on line 36