Fatal error: Uncaught Error: Class 'CDbSchema' not found in /var/www/html/dev/sophia_frm_ext_lib/extensions/yiidb2/CIbmDB2Schema.php:16 Stack trace: #0 {main} thrown in /var/www/html/dev/sophia_frm_ext_lib/extensions/yiidb2/CIbmDB2Schema.php on line 16