Unable to add domain based email account

Unable to add domain based email account

Namaste !

i am getting error message when i try to add new user.

It says: " This user is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details"

My Website: https://sabdasansar.com
Email(tried to add in zoho): info@sabdasansar.com

Thank You!