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Passenger provides a user-friendly, on-screen error handler to assist debugging a Python/Ruby/Node.js application. During production, however, this may result in unnecessary and possibly dangerous information disclosure. You can turn off Passenger’s built-in logger and use Apache’s generic error handler by adding the following line to your .htaccess file located within the öffentlich/ folder of your app:
PassengerErrorOverride On
Errors can then be viewed through /var/log/httpd/passenger.log
Error message generated when Passenger is set to handle error messages (default).
Generic Apache error handler when PassengerErrorOverride is set to Aus.