-<link rel="stylesheet" href="<?php p(OCP\Util::linkTo('grauphel','grauphel.css')); ?>" type="text/css"/>
+<link rel="stylesheet" href="<?php p(OC::$server->getURLGenerator()->linkTo('grauphel','grauphel.css')); ?>" type="text/css"/>
<?php /** @var $l OC_L10N */ ?>
<?php $_['appNavigation']->printPage(); ?>