fail to run guide demo of DeepRacer SageMaker

Hello Alexdudu, it's hard to respond without knowing the full stacktrace and I think you havent pasted it all. Where did you take this notebook from btw? If it's the sample one available in SageMaker sample notebooks I don't know if that one is working to be frank. Have a look at https://catalog.us-east-1.prod.workshops.aws/workshops/66473261-de66-42a1-b280-3e0ec87aee26/en-US for a DeepRacer workshop with SageMaker and this repository https://github.com/aws-deepracer/aws-deepracer-workshops which most likely contains what this workshop is using, but most importantly has been updated around re:Invent and there have been advanced workshops with a notebook at the conference so chances are high it will work.