Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows Update Error 0x80070002 After Update
After a Windows Update, you may see error 0x80070002. This usually means the system can't fin...
Fix Git SSL Certificate Problem: Unable to Get Local Issuer
You run git clone https://example.com/repo.git and get:
fatal: unable to acc...
VSCode Integrated Terminal Not Showing: Fixes to Try
You open the integrated terminal in Visual Studio Code using Ctrl+` (or Cmd+`<...
Fix Windows Defender Real-Time Protection Stuck Off in Windows 11
You open Windows Security, see real-time protection is off, click the toggle, and it turns back o...
Fixing Python UnicodeDecodeError When Reading a File
You open a file in Python, call read(), and get a UnicodeDecodeError. T...
Issue queue
SitemapWindows 11 Blue Screen After Update Fix with SFC
Fix Docker Desktop Engine Not Running on Windows
Troubleshoot Nginx SSL Redirect Loop
Resolving Git SSL Certificate Error: Local Issuer Not Found
Resolving Duplicate Git Remote Origin in VS Code
Resolving Module Not Found in npm Build
Docker Pull Access Denied Error Windows 10 Guide
Docker Compose Environment Variable Not Working: Fixes
Python Requests: Fixing Connection Timeout with Proxies
Check Node Version Compatibility Before Installing a Package
Cloudflare Origin Certificate Error After SSL Mode Change
Chrome Update Memory Leak Troubleshooting
Fix Docker Desktop Engine Not Running on Windows
Troubleshoot Nginx SSL Redirect Loop
Resolving Git SSL Certificate Error: Local Issuer Not Found
Resolving Duplicate Git Remote Origin in VS Code
Resolving Module Not Found in npm Build
Docker Pull Access Denied Error Windows 10 Guide
Docker Compose Environment Variable Not Working: Fixes
Python Requests: Fixing Connection Timeout with Proxies
Check Node Version Compatibility Before Installing a Package
Cloudflare Origin Certificate Error After SSL Mode Change
Chrome Update Memory Leak Troubleshooting