Not able to execute the Test Set from Test Manger and Orchestrator getting error 'The proxy tunnel request to proxy 'http://127.0.0.1:9000/' failed with status code '403'." '

Help Test Cloud
,
2

1st question - looks like its something related poxy check firewall settings

refer below link

2nd question- Ensure that the robot assigned to execute the test set has the Testing Runtime enabled.