Claude Code Login Errors: The Ultimate Fix for 403 and ECONNREFUSED

How to Fix Claude Code Login Errors (403 and ECONNREFUSED): A Real Troubleshooting Guide I heard that Anthropic just released a “NO_FLICKER” mode for Claude Code. It’s supposed to stop the annoying terminal flickering once and for all. I opened my terminal, ready to try it out with this command: CLAUDE_CODE_NO_FLICKER=1 claude Then I hit a wall right at the start. The terminal said: Login OAuth error: Request failed with status code 403 What followed was a half‑hour journey through five separate pitfalls. The last one was hidden in a place I never thought to look. This article is my …