Infinite loop when I configure www as Preferred domain

[SalvadorS]

Hello,

I have a problem with one domain. I want to select www as Preferred domain. These are the steps:

Go to subscriptions
Click the domain I would like to manage
Go to websites & domains
Click on "Hosting Settings"
Select "www.domain.tld" in the "Preferred domain"
Clik "OK"

And now if I go to www.domain.com I have an infinite loop and no webpage is shown....

Any ideas?