at cPanel head to public_html/ow_includes,
click/Highlight config.php,
at top of cPanel click/Open up Code Editor,
go to that page, at bottom of that sheet you will see:
define('OW_DEBUG_MODE', false);
define('OW_DEV_MODE', false);
define('OW_PROFILER_ENABLE', false);
double check there not set as true or !false
set them to false
Top right click on Save Changes, done...