Office 365 Site Collection URL name

I am in the process of creating a new workflow that automates the creation of a site.  I am using the Office 365 Create Site Collection action.  The workflow runs and the item is added to my list.  However, the workflow suspends and I get the following message:

"The site collection URL name 'https://tenant.sharepoint.com/sites/' is invalid"

I have used variations of the URL name but gets basically the same error.

https://tenant.sharepoint.com/

https://tenant.sharepoint.com/sites/

https://tenant.sharepoint.com/teams/

https://tenant.sharepoint.com/teams/‍{Current Item:SiteTitle}

I have been unable to get past this message.