Unable to send email when segment qualification event happens

Hi there, 

I am trying to implement one use case which requires to send an email to customer when it qualifies certain segment. 
My journey orchestration flow is like [Segment Qualification Event (Behaviour:Enter)] -> [Custom Action : Email] -> End.
Here the problem is I am unable to send email [may be because I'm unable to pass profile email id].
Note : Custom Action to send an email works fine when I use it with event other than segment qualification.