Invalid email linking Zoho CRM with Zoho support

Invalid email linking Zoho CRM with Zoho support

I am trying to link our Zoho CRM account with the trial version of Zoho Support and when i introduce the email of the administrador of our Zoho CRM and the ZCR code when submitting the form i get the follwing error message: 

Invalid ZohoCRM Admin Email. 
Please provide a valid Email.

What can i do to make it work?