Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listERR_NAME_NOT_RESOLVED on Chrome Linux: Fix Guide
You're browsing on Chrome in Linux and suddenly a page won't load, showing ERR_NA...
Fix NET::ERR_CERT_AUTHORITY_INVALID on Windows 10
You're browsing in Chrome or Edge and see NET::ERR_CERT_AUTHORITY_INVALID. T...
How to Fix Git Detached HEAD Error
You run git status and see "HEAD detached at" followed by a commit hash. Thi...
How to Show Hidden Icons on Taskbar in Windows 10
You may notice that some app icons in the system tray (notification area) are hidden behind an up...
How to Fix pnpm ENOENT Error (Practical Steps)
When you see an ENOENT error with pnpm, it usually means the system cannot find a file or directo...
Topic paths
Quick titles
Fix Windows Security App Crash in Safe ModeNode.js Heap Out of Memory: GC Tuning GuideHow to Recover Stashed Changes in Git Detached HEADnpm run build Error After Install: SolutionsFix Chrome Certificate Error: Invalid Authority & Date/Time IssueHow to Fix Node Sass Not CompilingFix Chrome High Memory Usage on Windows and MacNode.js Heap Out of Memory vs Stack Overflow: Key Differences