Fatal error: Uncaught Error: Call to a member function num_rows() on boolean in /var/www/html/system/database/DB_active_rec.php:990 Stack trace: #0 /var/www/html/application/models/estate_m.php(196): CI_DB_active_record->count_all_results() #1 /var/www/html/application/controllers/frontend.php(4297): Estate_m->count_get_by(Array, false, NULL, 'data_order DESC...', NULL, Array) #2 /var/www/html/system/core/CodeIgniter.php(359): Frontend->index() #3 /var/www/html/index.php(225): require_once('/var/www/html/s...') #4 {main} thrown in /var/www/html/system/database/DB_active_rec.php on line 990