Unable to set permissions on any object in VCO 5.5

Hello everyone,

we have a working workflow in vSphere 5.1 which set permissions on all vCenter objects from an XML file input.

I tried this workflow on our new test infra (VCSA 5.5 + VCO appliance 5.5.1) and I always have this error message : "The object or item referred to could not be found"

Here's the code sample :

var vcs = VcPlugin.allSdkConnections;
var vc = vcs[0];
var perm_For_Object = new Array();
var permission = new VcPermission();
permission.group = false;
permission.principal = "deploy";
permission.propagate = false;
permission.roleId = rolesID.get("Admin");
perm_For_Object.push(permission);
var allObjects = new Array();
var objects = Server.findAllForType("VC:VMFolder","xpath:name='perm'");
for each (var obj in objects) allObjects.push(obj);
vc.authorizationManager.setEntityPermissions(objects[0],perm_For_Object);

Ofc, the folder "perm" exists and the user "deploy" is a local one from the VCSA.

Any help appreciated.

Regards