Git Push Rejected Non Fast Forward: Troubleshooting Checklist
If you see ! [rejected] main -> main (non-fast-forward) when running
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Change npm Directory to Avoid Permission Denied
If you've seen "EACCES: permission denied" when running npm install -g, ...
How to Resolve Port Already in Use in Docker Compose
When you run docker compose up and get an error like port is already allocated...
Node Sass Build Failed: Complete Troubleshooting Checklist
When you see "Node Sass does not yet support your current environment" or a build failure...
Fix Windows Explorer Restarting with SFC Scannow
If Windows Explorer keeps restarting on its own—your taskbar disappears and reappears, or File Ex...
Node.js Memory Limit Increase Not Working: Fixes
You set --max-old-space-size=4096 but Node.js still crashes with a memory error. Thi...
Issue queue
SitemapTroubleshoot Firefox Certificate Errors in Windows 10
VS Code Python Permission Denied: Troubleshooting Guide
How to Resolve Nginx Configuration Test File Not Found Error
Docker Compose Nginx: Port Already in Use Fix
Resolve Nginx Redirect Loop Behind Cloudflare
Windows 10 Can't Access Shared Folder: Fixes
VS Code Git Status Empty After Save Troubleshooting
Git Push Rejected Non Fast Forward Fix
Cloudflare Origin Certificate Troubleshooting Steps
Python venv Troubleshooting Guide
Windows 11 Update Stuck at 0%: How to Fix Setup Freeze
Node.js Memory Errors: Heap vs Stack
VS Code Python Permission Denied: Troubleshooting Guide
How to Resolve Nginx Configuration Test File Not Found Error
Docker Compose Nginx: Port Already in Use Fix
Resolve Nginx Redirect Loop Behind Cloudflare
Windows 10 Can't Access Shared Folder: Fixes
VS Code Git Status Empty After Save Troubleshooting
Git Push Rejected Non Fast Forward Fix
Cloudflare Origin Certificate Troubleshooting Steps
Python venv Troubleshooting Guide
Windows 11 Update Stuck at 0%: How to Fix Setup Freeze
Node.js Memory Errors: Heap vs Stack