Fix for not loading the translation / some more notice removed (#5569)

src/Core/L10n.php

@@ -180,6 +180,8 @@ class L10n extends BaseObject
 	 */
 	public static function tt($singular, $plural, $count)
 	{
+		$a = self::getApp();
+
 		$lang = Config::get('system', 'language');
 
 		if (!empty($a->strings[$singular])) {

src/Worker/Delivery.php

@@ -275,6 +275,12 @@ class Delivery extends BaseObject
 
 			$user = DBA::selectFirst('user', [], ['uid' => $target_uid]);
 
+			// This should also never fail
+			if (!DBA::isResult($user)) {
+				logger('No user found for uid ' . $target_uid);
+				return;
+			}
+
 			$target_importer = array_merge($target_importer, $user);
 
 			// Set the user id. This is important if this is a public contact