ok, so with a fresh flytekit venv that part works now... no idea what went wrong the first time...
but it fails in flyte-copilot-downloader with
time="2023-03-05T20:26:06Z" level=info msg="[0] Couldn't find a config file []. Relying on env vars and pflags."
{"json":{},"level":"info","msg":"Downloading inputs from [<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>]","ts":"2023-03-05T20:26:06Z"}
{"json":{},"level":"error","msg":"Failed to read from the raw store [<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>] Error: getItem, getting the object: RequestError: send request failed\ncaused by: Head <http://localhost:30002/my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>: dial tcp [::1]:30002: connect: connection refused","ts":"2023-03-05T20:26:06Z"}
{"json":{},"level":"error","msg":"Failed to download inputs from [<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>], err [path:<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>: getItem, getting the object: RequestError: send request failed\ncaused by: Head <http://localhost:30002/my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>: dial tcp [::1]:30002: connect: connection refused]","ts":"2023-03-05T20:26:06Z"}
{"json":{},"level":"info","msg":"Exited downloading inputs from [<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>]","ts":"2023-03-05T20:26:06Z"}
{"json":{},"level":"error","msg":"Downloading failed, err failed to download input metadata message from remote store: path:<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>: getItem, getting the object: RequestError: send request failed\ncaused by: Head <http://localhost:30002/my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/inputs.pb>: dial tcp [::1]:30002: connect: connection refused","ts":"2023-03-05T20:26:06Z"}
{"json":{},"level":"info","msg":"Uploading Error file to path [<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb>], errFile: errors.pb","ts":"2023-03-05T20:26:06Z"}
{"json":{},"level":"error","msg":"Failed to write to the raw store [<s3://my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb>] Error: Failed to write data [493b] to path [metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb].: PutObject, putting object: RequestError: send request failed\ncaused by: Put <http://localhost:30002/my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb>: dial tcp [::1]:30002: connect: connection refused","ts":"2023-03-05T20:26:06Z"}
{"json":{},"level":"error","msg":"Failed to write error document, err :Failed to write data [493b] to path [metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb].: PutObject, putting object: RequestError: send request failed\ncaused by: Put <http://localhost:30002/my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb>: dial tcp [::1]:30002: connect: connection refused","ts":"2023-03-05T20:26:06Z"}
Error: Failed to write data [493b] to path [metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb].: PutObject, putting object: RequestError: send request failed
caused by: Put <http://localhost:30002/my-s3-bucket/metadata/propeller/flytesnacks-development-ahwn6q5rj8phfxhqfgf6/ellipse-area-metadata-shell/data/3/errors.pb>: dial tcp [::1]:30002: connect: connection refused
seems it tries to connect via IPv6 instead of IPv4, will further try to debug tomorrow..