Job queued for execution - botium box

i m using tried version of botium. the solution which was provided in previous such issue was to check the heartbeat of botium agent. attaching the screenshot of that as well. i am able connected to kori.ai chatbot and then connected the test set but on running the an error came 'Job queued for execution'

and on doing the live chat with bot .error came '504 gateway timeout' enter image description here