ChatGPT & Claude Down? How to Fix "https://www.google.com/url?sa=E&source=gmail&q=challenges.cloudflare.com" Loop (Nov 18, 2025)
🚨 ChatGPT & Claude Access Denied: Cloudflare Error (Nov 18, 2025)
Is your ChatGPT or Claude stuck on the "challenges.cloudflare.com" screen? You are not alone.
A global outage affecting Cloudflare is causing this infinite loop. Here are 3 quick fixes you can try right now.
✅ How to Fix the Infinite Loop
- Disable Extensions: Turn off AdBlockers (uBlock, AdGuard) or VPNs temporarily. This is the most common fix.
- Use Incognito Mode: Open a private window (Ctrl + Shift + N) and try logging in again.
- Change Network (Hotspot): Disconnect from Wi-Fi and use your mobile data hotspot to change your IP address.
If these methods don't work, it's a server-side issue. Please wait for Cloudflare to resolve the outage.

