diff --git a/apps/systemtags/lib/Settings/Admin.php b/apps/systemtags/lib/Settings/Admin.php
index 351c226439..ed72e17cf5 100644
--- a/apps/systemtags/lib/Settings/Admin.php
+++ b/apps/systemtags/lib/Settings/Admin.php
@@ -23,19 +23,11 @@
 
 namespace OCA\SystemTags\Settings;
 
-use OCA\Federation\TrustedServers;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\Settings\ISettings;
 
 class Admin implements ISettings {
 
-	/** @var TrustedServers */
-	private $trustedServers;
-
-	public function __construct(TrustedServers $trustedServers) {
-		$this->trustedServers = $trustedServers;
-	}
-
 	/**
 	 * @return TemplateResponse
 	 */
diff --git a/lib/private/Installer.php b/lib/private/Installer.php
index 1c45679cd3..3d8a923417 100644
--- a/lib/private/Installer.php
+++ b/lib/private/Installer.php
@@ -594,7 +594,8 @@ class Installer {
 		OC_App::setAppTypes($info['id']);
 
 		if(isset($info['settings']) && is_array($info['settings'])) {
-			\OC_App::loadApp($app, false);
+			// requires that autoloading was registered for the app,
+			// as happens before running the install.php some lines above
 			\OC::$server->getSettingsManager()->setupSettings($info['settings']);
 		}
 
diff --git a/lib/private/legacy/app.php b/lib/private/legacy/app.php
index df76c5b89f..c786a1fc53 100644
--- a/lib/private/legacy/app.php
+++ b/lib/private/legacy/app.php
@@ -348,7 +348,8 @@ class OC_App {
 
 		$info = self::getAppInfo($app);
 		if(isset($info['settings']) && is_array($info['settings'])) {
-			self::loadApp($app, false);
+			$appPath = self::getAppPath($app);
+			self::registerAutoloading($app, $appPath);
 			\OC::$server->getSettingsManager()->setupSettings($info['settings']);
 		}
 	}
@@ -1170,7 +1171,8 @@ class OC_App {
 			}
 
 			if(isset($info['settings']) && is_array($info['settings'])) {
-				self::loadApp($app, false);
+				$appPath = self::getAppPath($app);
+				self::registerAutoloading($app, $appPath);
 				\OC::$server->getSettingsManager()->setupSettings($info['settings']);
 			}
 
@@ -1212,7 +1214,8 @@ class OC_App {
 		}
 		self::setupBackgroundJobs($appData['background-jobs']);
 		if(isset($appData['settings']) && is_array($appData['settings'])) {
-			self::loadApp($appId, false);
+			$appPath = self::getAppPath($appId);
+			self::registerAutoloading($appId, $appPath);
 			\OC::$server->getSettingsManager()->setupSettings($appData['settings']);
 		}