warning on 'Some required modules' page

advanced_help_form_system_modules_alter assumes that the modules page is being displayed and that $form['modules'] exists.
When enabling the module with other modules that have dependencies, the interim page telling you want dependencies will be installed gives a warning.
This can be fixed with

function advanced_help_form_system_modules_alter(&$form, &$form_state) {
  if (empty($form['modules'])) return;
  ...
}