This may not work on all sites depending on the hosting environment.
just go to global config > server > error reporting and choose the level you need.
thanks for the effort ;)
The setting of error reporting only sets the level of reporting not if it should be displayed or not. That is the purpose of the plugin. The plugin is also meant for end-users to display possible warnings/errors when their site by default has display errors set to off without having to go into a php.ini or htacess file. Thanks.