There are a number of Azure DevOps (VSTS) extension in this repo so please say which one you are using, and if an extension contains multiple tasks which task also
You can run the extensions in the cloud or on-premise
- Azure DevOps Service (VSTS)
- Azure DevOps Server (on-premise TFS, if so what version)
I assume it is the currently public version, if you are using an older version on-premises let me know, but the answer will probably involve upgrading to the currently public version