How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Reinstall Windows Security App (Microsoft Defender)
If the Windows Security app (Microsoft Defender) is missing, crashing, or not opening, reinstalli...
How to Resolve Git Merge Conflicts on the Same Line
You run git merge and get a conflict marker on a single line. The file shows both ve...
Fix pip Error: Externally Managed Environment
If you're on a modern Linux distribution (like Debian 12, Ubuntu 23.04+, Fedora, or Arch) and...
Fix Nginx Configuration Test Failure After Adding Proxy Pass
You add a proxy_pass directive to an Nginx server block, run nginx -t, ...
How to Fix pnpm Install Stuck at Resolving Dependencies
When pnpm install hangs on "Resolving dependencies", the process may appear stuck for min...
Issue queue
SitemapAntivirus Blocking Chrome Extensions? Fix It
Edge History Not Syncing? Try These Fixes
Understanding and Resolving Git Detached HEAD
Understanding DNS Probe NXDOMAIN and Server Not Found
How to Use Git LFS with GitHub: Setup and Troubleshooting
VS Code IntelliSense Not Working for Python: Common Fixes
Docker Compose .env File Troubleshooting Guide
Fix ERR_NAME_NOT_RESOLVED After Chrome Update
Fix Node Sass Build Failures: Alternatives and Migrations
Fixing Node Sass Build Failures on Linux
Fixing Python Memory Error with Large CSV Files in Pandas
How to Fix 'Git Remote Origin Already Exists' Error
Edge History Not Syncing? Try These Fixes
Understanding and Resolving Git Detached HEAD
Understanding DNS Probe NXDOMAIN and Server Not Found
How to Use Git LFS with GitHub: Setup and Troubleshooting
VS Code IntelliSense Not Working for Python: Common Fixes
Docker Compose .env File Troubleshooting Guide
Fix ERR_NAME_NOT_RESOLVED After Chrome Update
Fix Node Sass Build Failures: Alternatives and Migrations
Fixing Node Sass Build Failures on Linux
Fixing Python Memory Error with Large CSV Files in Pandas
How to Fix 'Git Remote Origin Already Exists' Error