Hi, The instructions in https://course.fast.ai/start_sagemaker do not work. The file: https://s3-eu-west-1.amazonaws.com/mmcclean-public-files/sagemaker-fastai-notebook/sagemaker-cfn-course-v4.yaml has AccessDenied or does not exist. I have tried to apply the fixes suggested in from https://github.com/fastai/course20/issues/60 to the original template: https://fastai-cfn.s3.amazonaws.com/sagemaker-cfn-course-v4.yml but nothing worked. Either the fastai kernel was not created, or I was not able to connect to it. Thanks! Cheers, Peter