Same problem, can you check if file is there?
This time the file is there, but the public-read permission is absent. You might want to check this thread - Getting Access Denied on S3 storage - #4 by dmitrii.k
I’m still using AWS_STORAGE_BUCKET_NAME
It’s up to you which bucket to use. The conversion queue is set up to access files inside AWS_MEDIACONVERT_BUCKET_INPUT and upload transcoded versions to AWS_MEDIACONVERT_BUCKET_OUTPUT, so if any files are required to be transcoded you might want to upload them to the appropriate bucket and generate links to the transcoded versions from the output bucket (or copy the files to the media bucket).