Issues with CSRF in CI4 tutorial

For example, if one sends a form post and you try to repeat  instead of firing the message =

Code:

The action you requested is not allowed

it does Exceptions=

PHP Code:

( "CodeIgniter\Security\Exceptions\SecurityException #403 (The action you requested is not allowed)".) 


But isn't this a setting in CI, that it should throw exceptions instead of printing/displaying errors?