Fixing Nginx 502 Bad Gateway in Docker Networks
You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Fix Git Large File Errors When Not Using LFS
If you've ever tried to push a commit containing a large file (e.g., a binary, a dataset, or ...
Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
Fix Cloudflare DNS Propagation Taking Too Long
You updated DNS records in Cloudflare but changes still aren't live hours later. This is frus...
Fix DNS Probe Finished NXDOMAIN on Router: Step-by-Step
You're browsing and suddenly Chrome shows 'DNS_PROBE_FINISHED_NXDOMAIN'. This means y...
How to Fix Windows Update Error 0x80070002 by Resetting Components
If you see error 0x80070002 when trying to run Windows Update, the system often cannot find or re...
Issue queue
SitemapTroubleshooting Cloudflare 526 Invalid Origin Certificate
Troubleshooting Cloudflare DNS Propagation Delays
Nginx Config Test Failures: Top Causes
How to Resolve Windows Update Cleanup Error 0x800f081f
Fix Chrome Crash on Startup Due to Hardware Acceleration
Windows 11 Update Not Progressing Past 0%
How to Stop Chrome Access Violation from Antivirus
Docker Prune Not Releasing Disk Space: What to Do
How to Turn On Edge Sync on Mac: Step-by-Step Guide
Resolve Node Engine Not Satisfied Error
Python Dependency Hell: Fixing Conflicts Across Requirements Files
Reduce Chrome Memory Usage on Mac: Practical Steps
Troubleshooting Cloudflare DNS Propagation Delays
Nginx Config Test Failures: Top Causes
How to Resolve Windows Update Cleanup Error 0x800f081f
Fix Chrome Crash on Startup Due to Hardware Acceleration
Windows 11 Update Not Progressing Past 0%
How to Stop Chrome Access Violation from Antivirus
Docker Prune Not Releasing Disk Space: What to Do
How to Turn On Edge Sync on Mac: Step-by-Step Guide
Resolve Node Engine Not Satisfied Error
Python Dependency Hell: Fixing Conflicts Across Requirements Files
Reduce Chrome Memory Usage on Mac: Practical Steps