Can't generate unique code in Zoho like described in "Domain Verification in Zoho"

Can't generate unique code in Zoho like described in "Domain Verification in Zoho"

I added a second domain to my account and wanted to verify this domain later. Clicking on Domains on the left side gives an error: I should contact support@zohomail.com. I didn't see the domains and can't therefor click on the verify button.

Please fix that problem.