Azure Devops for Power apps

Question

I am Implementing DevOps for PowerApps by following this link: https://docs.microsoft.com/en-us/powerapps/developer/common-data-service/build-tools-overview.

In manual deployment, we export the app and import it to another app by updating it. And then we publish it but when I added the task for import and export an error occurred.

"##[error]Cannot bind argument to parameter 'String' because it is an empty string."

Can anyone help me solve this?