[Resolved] Task manager email notification

Hi, 

I created a task from Management portal  Task manager to use the Ens.Util.Tasks.Purge task . Task set up includes email notification setup for Completion email and error email.

This task is giving an error  and no email is generated: 

I tested all other task types available from Ens.Util.task but all are giving the same error.

Not sure if this Is this a bug or some missing configuration in the task setup ? Anyone noticed any similar issue or any idea how to fix this ? 

Thank you for your help.

Regards,

Mary