StartTranscriptionJob with AWS returning: "An error occurred (400) when calling the StartTranscriptionJob operation:" but no further details

I've been trying to get started with the StartTranscriptionJob with AWS and I'm receiving a "An error occurred (400) when calling the StartTranscriptionJob operation:" But not further details.

This is the only response I'm getting:

botocore.exceptions.ClientError: An error occurred (400) when calling the StartTranscriptionJob operation: 

I'm using copy/paste code from the transcribe documentation with a file uri of:

file_uri = 's3://alpe-files/lessons/the convergence of crypto and ai.mp3'