Oh, I see the problem. The error is showing because 4.7 doesn't support use statements. Since I've been testing v5, I've started using shortcuts in my latest code:
public static function modifyForm( Form &$form, $service )
The framework's default function instead uses:
public static function modifyForm( \IPS\Helpers\Form &$form, $service )
@BrianCorrell You can ignore that warning, as it's not really an error but a detection issue caused by a bug in the tool.
As soon as my server is fixed I'll release a new version to address the warning. The application will work without problems, though.