[BUG] warn for ec2 iam role issue

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

500 error in prediction: failed to refresh cached credentials, no EC2 IMDS role found, operation
error ec2imds
this bug showed up since v2.1.23

What Should Happen?

500 error in prediction: failed to refresh cached credentials, no EC2 IMDS role found, operation
error ec2imds

each time when I ask claude code to give me any answers, 100% re-produce

Error Messages/Logs

500 error in prediction: failed to refresh cached credentials, no EC2 IMDS role found, operation
  error ec2imds

Steps to Reproduce

any prompt will hit this error

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.25

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

iTerm2

Additional Information

I hit this error on mac and Linux system