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 notesFix VSCode Terminal 'Permission Denied' on Windows
If you see 'permission denied' in the VSCode integrated terminal on Windows, it's usu...
Fix Git Stash Error: index.lock File Exists
You run git stash and see: fatal: Unable to create 'path/.git/index.lock&#...
Resolve Python Package Version Mismatch Errors
You run pip install and see errors like “package A requires package B==1.0 but y...
Python Virtual Environment Activation Failed: Common Fixes
You've created a Python virtual environment, but when you try to activate it, nothing happens...
Fix Docker Build Context Canceled Error with Large Directories
When you run docker build on a project with a large directory, you might see an erro...
Issue queue
SitemapHow to Resolve npm Build Failure in Windows
Resolve npm Install Permission Errors Caused by Yarn
Port Already Allocated in Docker Compose
How to Fix Windows Update Error 0x80070002 by Resetting Components
How to Fix Bluetooth After Windows 11 Update
How to Resolve 'git remote add origin already exists'
VSCode Terminal Permission Denied Error on Windows
Fix Windows Security App by Resetting Settings
Fix 'Package Requires Different Node Version' Error
How to Restore Windows Update Service in Services.msc
Windows Security App Disappeared from Start Menu
Linux VS Code: Git Authentication Failed Troubleshooting
Resolve npm Install Permission Errors Caused by Yarn
Port Already Allocated in Docker Compose
How to Fix Windows Update Error 0x80070002 by Resetting Components
How to Fix Bluetooth After Windows 11 Update
How to Resolve 'git remote add origin already exists'
VSCode Terminal Permission Denied Error on Windows
Fix Windows Security App by Resetting Settings
Fix 'Package Requires Different Node Version' Error
How to Restore Windows Update Service in Services.msc
Windows Security App Disappeared from Start Menu
Linux VS Code: Git Authentication Failed Troubleshooting