initializing or connecting to Thespian cluster fails with the type initializer error

[KoenigLear]

When initializing the Thesipan cluster either by ThespianCluster.InitOnCurrentMachine or ThespianCluster.Connect it fails with the type initializer for MBrace.Thespian.ThespianCluster threw an exception. Unfortunately it doesn't give anymore detail.

I obtain this errors while trying to add the thespian libraries to a hello world from scratch f# project.

if I execute mbrace.thespian.worker.exe I'm able to see it running but I'm unable to connect

INFO : Initializing MBrace.Thespian Worker node.
INFO : Hostname: D***
INFO : Process Id: 45364
INFO : Thespian initialized with listener D***:53748
INFO : Initialized controller actor:
actor://controller.WorkerControllerMsg
utcp://***:53748/controller
mailbox://controller/.

[KoenigLear]

After forcefully copying the dlls under tools*.* I'm obtain a different error
"unset executable path" System.InvalidOperationException