All cmdlets fail with "Request headers must contain only ASCII characters." for some locales

[eriklz]

Description

If I run any AWS cmdlet from AWS.Tools that communicate with AWS services fail after about 35 seconds with the error message "Request headers must contain only ASCII characters.".

$PSCulture is set to sv-SE in PowerShell.

If I go into macOS system settings and change regional locale settings to country USA instead of Sweden, then run the same thing, it works just fine.

Also, if I start a pwsh terminal session in VS Code, it defaults to en-US for $PSCulture, even if the system locale is set to Sweden (sv-SE). In VS Code terminal it also works fine there.

Presumably since Swedish includes a few non-ASCII characters in the alphabet, this may be part of what is causing the problem here. I noticed that there was a query from 2019 in the AWS community forums for PowerShell scripting where a person had the same issue on macOS (10.15), with no response. So it does not seem to be a new issue.

Reproduction Steps

1. In macOS regional settings, change the country to Sweden and change the primary language to Sweden. Accept all changes as-is.
2. Start an Apple Terminal with pwsh
3. Verify that $PSCulture is set to 'sv-SE'
4. Run any AWS cmdlet that uses AWS services

Logs

With $PSCulture = 'sv-SE':
PS /Users/erikl> Get-EC2Vpc -ProfileName erik -region eu-west-1 -verbose -Debug
DEBUG: Credentials obtained from stored profile named 'erik'
DEBUG: Region obtained from region parameter with value 'eu-west-1'
VERBOSE: Invoking Amazon Elastic Compute Cloud (EC2) operation 'DescribeVpcs' in region 'eu-west-1'
Get-EC2Vpc: Request headers must contain only ASCII characters.

with $PSCulture = 'en-US' or $PSCulture = '':
PS /Users/erikl> Get-EC2Vpc -ProfileName erik -region eu-west-1 -verbose -Debug
DEBUG: Credentials obtained from stored profile named 'erik'
DEBUG: Region obtained from region parameter with value 'eu-west-1'
VERBOSE: Invoking Amazon Elastic Compute Cloud (EC2) operation 'DescribeVpcs' in region 'eu-west-1'

CidrBlock : 172.31.0.0/16
CidrBlockAssociationSet : {vpc-cidr-assoc-1dfa7777}
DhcpOptionsId : dopt-3baf7999
InstanceTenancy : default
Ipv6CidrBlockAssociationSet : {}
IsDefault : True
OwnerId : 123456789012
State : available
Tags : {}
VpcId : vpc-6f741111

Environment

AWS Tools for PowerShell 4.1.7.0.
macOS 11.1 (BigSur)
PowerShell 7.1.1

Tested in Apple Terminal and VS Code terminal, see above.

Resolution

---

This is a 🐛 bug-report

[ashishdhingra]

Easily reproducible using the following steps:

• In 'System Preferences' > Language & Region, set Region as Sweden and primary language in Preferred languages as Svenska - Swedish.

• Open MacOS terminal.

• Verify that output of $PSCulture is sv-SE. Then execute the command Get-EC2Vpc -region eu-west-1 -verbose -Debug. It gives error Get-EC2Vpc: Request headers must contain only ASCII characters..

[github-actions]

We have noticed this issue has not received attention in 1 year. We will close this issue for now. If you think this is in error, please feel free to comment and reopen the issue.

[ashishdhingra]

Do not auto close