Fatal error: Uncaught Error: Call to a member function result_array() on boolean in /var/www/olympiadsuccess.in/application/models/liveclass.php:839 Stack trace: #0 /var/www/olympiadsuccess.in/application/controllers/live.php(5488): Liveclass->allclassDetails('ongoing') #1 /var/www/olympiadsuccess.in/system/core/CodeIgniter.php(717): Live->batch_fee() #2 /var/www/olympiadsuccess.in/index.php(196): require_once('/var/www/olympi...') #3 {main} thrown in /var/www/olympiadsuccess.in/application/models/liveclass.php on line 839