PO workflow Email notification error


I have configure workflow for PO in AX 2012 RTM instance . but got below error in PO once configure e-mail notification:

Stopped (error): X++ Exception: No message was sent. Language en-us was not found.
at SysWorkflowWorkItem-create


Workflow Email notification working fine for purchase requisition but throwing above error in PO.
there is no error if remove workflow email notification setup.
Can any one suggest solution for above issue please.


"Language en-us was not found"

Is this language supported by your licence? If not, try changing to supported one.

license is compatible to EN-US language. moreover email template, workflow and company language is en-us.

and with same setup purchase requisition workflow email notification is working properly.

Try it with a different Email template , as this looks like a template issue