@Rocky111 unfortunatelly reboot doesn’t help there. Since the resources are created in AWS and other resources has to be deleted manually or they get cleared after the lab session expires (e.g. etl-jobs, connections, databases).
What you are asking to start from the beginning are those instructions provided under the “Coursera Labs → Refreshing your Workspace”. What it says basically is to delete/rename files edited before and use get latest version to recreate them in their initial state. I am not sure the lab refresh form resets your lab settings not the lab to a previous state.
My question is that the json-songs transform jobs would fail if you didn’t use the correct Pacific-Time-Current_Date. I am not sure what was your mistake if your jobs succeded the first time. Check if your jobs have succeded before moving on and note that the API Endpoint changes every lab session (two places in extract_job/glue.tf). Hope it helps