Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesWindows Security App Not Opening on Windows 10: Fixes That Work
When you click the Windows Security icon in the Start menu or taskbar and nothing happens, it’s u...
Checklist for Troubleshooting Nginx Permission Denied Errors
Understanding the Problem
When Nginx returns a 403 Forbidden or logs an error like ...
Windows 11 Wi-Fi Connected but No Internet: Step-by-Step Fix
You're connected to Wi-Fi, but websites won't load and apps show no internet. This is a c...
How to Fix a Detached HEAD with Git Reset --hard
You're working in Git, and suddenly you see a warning: You are in 'detached HEAD...
Fix Chrome Status Access Violation: Clean Install Guide
If you see 'Status access violation' in Chrome, it usually means a corrupted user profile...
Issue queue
SitemapWindows 11 Taskbar Icons Missing? Fixes That Actually Work
Fix Windows 11 Update Stuck at 0% with Low Disk Space
Windows 10 Search Index Broken After Update: Fix
Fix npm run build Exit Code 1: Common Causes and Solutions
Git Merge Auto-Resolve Not Working: Troubleshooting Guide
Fix Git index.lock File Exists Permission Denied Error
Cloudflare Error 526: Causes and Solutions
Fix Cloudflare 522 Connection Timed Out Error
Python Requests Timeout Not Working: How to Fix
How to Resolve Nginx Upstream Connection Refused
How to Reduce Chrome Memory Usage
Node.js Heap Out of Memory: Increase Memory for npm
Fix Windows 11 Update Stuck at 0% with Low Disk Space
Windows 10 Search Index Broken After Update: Fix
Fix npm run build Exit Code 1: Common Causes and Solutions
Git Merge Auto-Resolve Not Working: Troubleshooting Guide
Fix Git index.lock File Exists Permission Denied Error
Cloudflare Error 526: Causes and Solutions
Fix Cloudflare 522 Connection Timed Out Error
Python Requests Timeout Not Working: How to Fix
How to Resolve Nginx Upstream Connection Refused
How to Reduce Chrome Memory Usage
Node.js Heap Out of Memory: Increase Memory for npm