Trouble Adding a .co.uk Domain to Zoho EU

Trouble Adding a .co.uk Domain to Zoho EU

Hello, I want to open an email account for a .co.uk domain on Zoho.eu but when I try to add the domain, it brings up this message: The email address you have entered belongs to a different deployment/region. Please contact support@zohoaccounts.com for assistance. What do I do to fix this issue. Appreciate all the help I can get. Many thanks to you all. Ewa