Hi @poojaskyrathore

Welcome to UiPath community

Kindly check out the below things

  1. Is machine template created and
    Is the robot created in orchestrator and is it of type unattended
  2. If robot is created and connected go to START-> Search as Services → look for UiPath Robot and right click it → Restart the service and give a try
  3. Or reconnect again as per this document

Check out this Official documentation

Check out this thread

Hope it will helps