Azure DevOps Task Execution error

Case Description

Hi, I am trying to integrate SoapUI project with the azure devops pipeline and added a task  "SoapUI Pro for Azure DevOps" for the same but When adding a simple test project and running a classic build template getting below error 

"##[error]Exception calling "Execute" with "0" argument(s): "The project is not a ReadyAPI Test project!"

Other useful information for better understanding -

--------------------------------------------------------------------

We have Self-hosted Windows servers with Azure Build agent.
Installed with trial license, the server is offline - so file based license.
Got the ReadyAPI extention in our Azure DevOps Service project.
--------------------------------------------------------------------
When running locally in Soap UI(OpenSource), no errors occur on the same project.

- Thanks