[BUG] 500 - internal server error

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?

Bug Description

Environment Info

• Platform: linux
• Terminal: windows-terminal
• Version: 2.1.29
• Feedback ID: 343c94f1-30aa-4d54-a7d1-366ba3b6bd30

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /home/toor/.local/share/claude/versions/2.1.29 (expected in multi-process scenarios)\n    at $w$ (/$bunfs/root/claude:3586:2098)\n    at xxA (/$bunfs/root/claude:3586:1209)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-03T15:42:33.927Z"},{"error":"Error: 500 {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\":\"Internal server error\"},\"request_id\":\"req_011CXmPdb6wNvz4h6izEs9bg\"}\n    at generate (/$bunfs/root/claude:340:8942)\n    at makeRequest (/$bunfs/root/claude:357:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-03T15:42:40.620Z"},{"error":"Error: 500 {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\":\"Internal server error\"},\"request_id\":\"req_011CXmPdbCePnPzkS5PpHyon\"}\n    at generate (/$bunfs/root/claude:340:8942)\n    at makeRequest (/$bunfs/root/claude:357:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-03T15:42:40.636Z"},{"error":"Error: 500 {\"type\":\"error\",\"error\":{\"type\":\"api_error\",\"message\":\"Internal server error\"},\"request_id\":\"req_011CXmPmyMNcqyUnbWwpSA8M\"}\n    at generate (/$bunfs/root/claude:340:8942)\n    at makeRequest (/$bunfs/root/claude:357:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-03T15:44:33.817Z"}]

On the TUI I got "⎿  API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXmPdbCePnPzkS5PpHyon"}"

What Should Happen?

Claude Code working and then all of sudden it started spewing 500 errors on all questions

Error Messages/Logs

⎿  API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CXmPdbCePnPzkS5PpHyon"}"

Steps to Reproduce

I get in my laptop, but I doubt many other people have it or I would have seen it by now in complaints.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.29 (Claude Code)

Platform

Other

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_