[REGRESSION]: Failed to perform Auto-login

[chadsugithub]

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• I searched for existing GitHub issues
• I read pipeline troubleshooting guide
• I checked how to collect logs

Task name

AzureFileCopyV6

Breaking task version

6.258.0

Last working task version

6.254.0

Regression Description

We have two pipelines where they were working fine with Azure File Copy version 6.254.0 but once the backend version upgraded to 6.258.0, it started causing our pipelines to break. The error message is: "Failed to perform Auto-login: PSContextCredential�[31;1mGet-AzAccessToken: -REDACTED-;1mA parameter cannot be found that matches parameter name 'AsSecureString'.�[0m"

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

Azure DevOps Server 2019.1

Operation system

Windows 11

Relevant log output

2025-06-02T17:40:21.9269175Z INFO: Scanning...
2025-06-02T17:40:41.9922184Z 
2025-06-02T17:40:42.2786978Z Failed to perform Auto-login: PSContextCredential?Get-AzAccessToken: -REDACTED-;1mA parameter cannot be found that matches parameter name AsSecureString.?
2025-06-02T17:40:42.2788885Z .
2025-06-02T17:40:42.3376695Z ##[error]Upload to container: 'files' in storage account: '' with blob prefix: '' failed with error: 'AzCopy.exe exited with non-zero exit code while uploading files to blob storage.' For more info please refer to https://aka.ms/azurefilecopyreadme
2025-06-02T17:40:42.4014746Z ##[warning]RetryHelper encountered task failure, will retry (attempt #: 1 out of 5) after 1000 ms

Full task logs with system.debug enabled

UNSUCCESSFUL RUN

 [REPLACE THIS WITH YOUR INFORMATION] 

SUCCESSFUL RUN

 [REPLACE THIS WITH YOUR INFORMATION] 

Repro steps