Please follow the below approach:
1. Kindly open the Robot settings in the Orchestrator window & reapply the Robot Password.
You will have to provide both domain\username and password for Orchestrator to create a Remote session on Robot /Studio machine.
Username - If your Robot username is in a domain please write it in the “domain\username” format.
Password - Provide the password to login to the Host machine.
Verify now
2. Go to services.msc and look for the service “UiRobot” and check under what useraccount it is running.
Please change the account under which UiRobot service was running to localsystem . (Identify if the Robot is running under robot service account, changed that to local system)
localsystem (which is default configuration) this ensures that service has access to all local resources.
( Run -> Services.msc -> UiPath Robot )
Restart the Robot service.
Verify now
3. Verify the encryption key in the web.config file. (In case if you have performed an upgrade, thereafter you are facing the issue)
Cross check with the config which you have taken as a backup.
4. If still, you are facing the Issue, kindly re-provision the Robot again to solve the Issue.
If none of the above helps, please raise a support request with tech support of UiPath
Technical Support: Contact Technical Support