aws: [ERROR]: argument of type 'NoneType' is not a container or iterable

[udf2457]

Describe the bug

I am trying to use aws against Hetzner S3

aws --profile=hetz-fsn1 s3 ls works fine, it lists all buckets.

but then

aws --profile=hetz-fsn1 s3 ls s3://my-bucket-name returns:

aws: [ERROR]: argument of type 'NoneType' is not a container or iterable

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

List contents of buckets

Current Behavior

Errors out with " aws: [ERROR]: argument of type 'NoneType' is not a container or iterable"

Reproduction Steps

1. Create bucket on Hetzner
2. Try aws --profile=hetz-fsn1 s3 ls, note bucket is listed
3. Try ``aws --profile=hetz-fsn1 s3 ls s3://bucket-name`, note error

Possible Solution

No response

Additional Information/Context

No response

CLI version used

aws-cli/2.34.16 Python/3.14.3 Darwin/25.4.0 exe/arm64

Environment details (OS name and version, etc.)

macOS 26.4

[EndlessLucky]

@udf2457, @ashovlin Can I work on this issue?

[udf2457]

@EndlessLucky I have no objection because I don't know Python anyway. 😉

[hssyoo]

@EndlessLucky You may not work on any issues in the aws-cli repository. Please refrain from asking in the future, in this issue or others.

[RyanFitzSimmonsAK]

Hi @udf2457, thanks for reaching out. The AWS SDKs and AWS CLI are intended for use with specifically AWS. Are you able to reproduce this behavior with AWS S3?

[ashovlin]

Could you also include --debug logs? That should contain the stack trace of where we're hitting the error.