Hello @CFernandes ,
Thank you so much once again.
My Flow All Actions :

here I am set wrong data for getting error message in Create Employee Action

here i am get Create_Employee Action for getting Error Message and Set in Mail but its not get.

I am trying to getting Error Message from Compose Action.

Mail is send successfully...

Please give me the solution.
Thanks & Regards,
Vijay M. Dantani