claude-code - 💡(How to fix) Fix [Bug] Cloudflare HTTP 403 "managed challenge" blocking all API requests from Spectrum ISP IP range [1 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/mattelsey/.local/share/claude/versions/2.1.123 (expected in multi-process scenarios)\n at x86 (/$bunfs/root/src/entrypoints/cli.js:2769:2177)\n at Jw8 (/$bunfs/root/src/entrypoints/cli.js:2769:1257)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-29T14:23:14.893Z"}]

TL;DR

The issue is likely due to Cloudflare's security features blocking requests from the user's IP range, and adjusting Cloudflare challenge rules for this IP range may resolve the issue.

Guidance

• Verify that the issue is specific to the user's IP range by testing the request from a different location or network.
• Check if other users in the same region or with the same ISP are experiencing similar issues.
• Investigate the Cloudflare ray ID to understand the specific challenge rules that are being applied.
• Consider reaching out to Cloudflare support to request adjustments to their challenge rules for the affected IP range.

Example

No code snippet is provided as it is not directly relevant to the issue.

Notes

The issue seems to be related to Cloudflare's security features and not a problem with the user's system or application configuration. The provided error message in the Errors section appears to be unrelated to the main issue.

Recommendation

Apply workaround: Reach out to Cloudflare support to request adjustments to their challenge rules for the affected IP range, as this is the most direct way to address the issue.