After update from 7.4.1 to 7.4.2 i got a security warning:
WHMCS\Exception\Application\InstallerExists: Application is up to date, but installer directory is still present in /home/.../vendor/whmcs/whmcs-foundation/lib/Utility/Bootstrap/Application.php:0Stack trace:#0 /home/.../init.php(0): WHMCS\Utility\Bootstrap\Application::verifyInstallerIsAbsent()#1 /home/.../admin/quotes.php(0): unknown()#2 {main}