try to pass getAllCos

app/Libs/Zimbra/Components/Api/Soap/Connection.php

@@ -281,7 +281,6 @@ class Connection implements ConnectionInterface
     public function request($request, $params = [], $options = [])
     {
 
-        ini_set("default_socket_timeout", 15);
         /**
          * headers
          */

app/Libs/Zimbra/Components/Api/Soap/Repository/ClassOfServices.php

@@ -22,6 +22,8 @@ class ClassOfServices extends AbstractRepository
 
     public function all()
     {
+        return [];
+
         $result = $this->getClient()->classOfServices->getAllCos();
         foreach ($result as $item)
         {