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Fatal error: Uncaught Error: Call to a member function close() on boolean in /home/ptech-iierdorg/html/events/header.php:48 Stack trace: #0 /home/ptech-iierdorg/html/events/paper-submission.php(29): include() #1 {main} thrown in /home/ptech-iierdorg/html/events/header.php on line 48