A robot with Username not defined to Orchestrator

We have two different approach to resolve this issue

Option 1. As suggested by other individuals you can change the user details in the UiPath orchestrator as per credential standards in the forum available below

Option 2 : Disconnect the the UiPath Studio or UiPath Robot from UiPath Orchestrator from system tray ( this will help you to resolve your issue - if you are executing the workflow from UiPath studio or UiPath robot)

I have disconnected the UiPath orchestrator while executing the UiPath workflow from my local machine and now i am able to run the workflow successfully