Warning: require_once(/opt/propstack/apps/pspfbackend/application/config/constants.php): failed to open stream: No such file or directory in /opt/propstack/apps/pspfbackend/system/core/CodeIgniter.php on line 70

Fatal error: require_once(): Failed opening required '/opt/propstack/apps/pspfbackend/application/config/constants.php' (include_path='.:/usr/share/php') in /opt/propstack/apps/pspfbackend/system/core/CodeIgniter.php on line 70