Iam starting my test set automatically (Orchestrator and test Manager ) my test get started but all the test case gets in the pending state

Hi, my selectors are working fine on my machine. They also work as expected on the production machine when I run them manually but when I run my automation using the orchestrator as an unattended robot for the production machine it fails and through error “Could not find the user-interface (UI) element for this action”.

Kindly suggest.