Fixing Nginx 502 Bad Gateway in Docker: Practical Steps
You set up Nginx as a reverse proxy in Docker, but instead of your app you see a 502 Bad Gateway....
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Reset Windows Search Index (Step by Step)
If Windows Search stops finding your files, returns old results, or uses high CPU, the search ind...
How to Fix Cloudflare Origin Certificate Validation Failed
If you see a "validation failed" error when setting up or using a Cloudflare Origin Certi...
How to Fix Nginx Redirect Loop with Cloudflare
You set up Cloudflare for your site, and now visitors see a redirect loop error. The page keeps r...
Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
Fix DNS Probe Finished NXDOMAIN Error in Windows 10
When you see "DNS_PROBE_FINISHED_NXDOMAIN" in Chrome or other browsers, it means the DNS ...
Issue queue
SitemapAvoid sudo pip: Fix Permission Denied in Python
Using nvm to Switch Node Version for a Specific Package
pnpm Lockfile Mismatch Troubleshooting
How to Fix npm Permission Denied for Global Packages
Edge Sync Not Syncing Passwords or Bookmarks: Fixes
Chrome Update Crash: Troubleshooting Guide
How to Fix Network Path Not Found Error in Windows
How to Fix Wi-Fi Adapter Not Working in Windows 11
Fixing Python UnicodeDecodeError When Reading UTF-16 Files
Fix Windows Update Service Not Running for System Restore
Fix npm install Permission Denied Without Sudo
Fix Windows Defender Error 0x800704ec: Real-Time Protection
Using nvm to Switch Node Version for a Specific Package
pnpm Lockfile Mismatch Troubleshooting
How to Fix npm Permission Denied for Global Packages
Edge Sync Not Syncing Passwords or Bookmarks: Fixes
Chrome Update Crash: Troubleshooting Guide
How to Fix Network Path Not Found Error in Windows
How to Fix Wi-Fi Adapter Not Working in Windows 11
Fixing Python UnicodeDecodeError When Reading UTF-16 Files
Fix Windows Update Service Not Running for System Restore
Fix npm install Permission Denied Without Sudo
Fix Windows Defender Error 0x800704ec: Real-Time Protection