Anyone had a Problem with free Cloud Build Pro

I had unity 5 pro subscription and when i try to subscribe to Unity Cloud Build Pro; I had a message as "Good news! As the owner of Unity 5 Pro, you get Cloud Build Pro free for 12 months."

But when i click to "Confirm" button I get a message as "There is already an active subscription on this account"

Then I can't use Cloud Build Pro features. There is 60 minutes between builds.