Fix OneDrive 504 Gateway Timeout: Setup & Troubleshooting Guide - How to Resolve Store Error 0x80073cf9 on Windows 10/11-How to Fix Cloudflare Flexible SSL Redirect Loop

Updated 2026-06-13 22:08:18developer-tools
Fix OneDrive 504 Gateway Timeout: Setup & Troubleshooting Guide - How to Resolve Store Error 0x80073cf9 on Windows 10/11-How to Fix Cloudflare Flexible SSL Redirect Loop
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.