Error install retool on kubernetes

i am trying install retool on kubernetes and i follow this step but i am encountering problem i can not access the retool.
the error on pod : logName: "projects/thisco/logs/stderr"
receiveTimestamp: "2021-09-07T09:30:02.027292376Z"
resource: {2}
severity: "ERROR"
textPayload: "./docker_scripts/ line 10: 17 Killed ./retool_backend"
timestamp: "2021-09-07T09:29:59.319598022Z"

Hey @wahyu!

Happy to help here! This can be a little difficult to remedy over the forums. Would you be able to write into our in-app support chat (intercom)?