Automation Testing using Test plan

Hi 

I was working on Unit Test for an Azure Function. Later we thought to use the Test plans in Azure.
So for it I have created a pipeline which deploys Azure Function. Later I have created a Test Plan with Test case and associated my unit test case (from visualstudio) ot it. Then from Test Plan Setting I have created a release pipeline which uses Artifact from earlier CI pipeline created. In included below things is release

But I am seeing below issue.

Am I missing something?

Thanks in advance