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 Docker Registry Authentication Failed Access Denied
You try to pull or push an image from a private Docker registry and get an error like authe...
How to Fix Docker Pull Unauthorized Access Denied
When you run docker pull and get an "unauthorized: access denied" error, Doc...
Fix Node.js Heap Out of Memory in Docker Containers
If your Node.js application running in a Docker container crashes with a "JavaScript heap out...
How to Fix Nginx 502 Bad Gateway in Docker Logs
If your Nginx container shows a 502 Bad Gateway error, it usually means Nginx cannot...
Fix Git SSL Certificate Error: Unable to Get Local Issuer Certificate
When cloning or pulling from a Git repository, you may see:
fatal: unable to access...Issue queue
SitemapHow to Fix Access Denied in Windows Security
Fix npm run build Failure from Missing Env Variables
Resolve Chrome Access Violation After Update
Fix Docker Desktop Engine Stopped Hyper-V Error
Fix Windows Explorer Restarting: Performance Troubleshooting Guide
Resolve Chrome Status Access Violation Error Guide
VS Code Git Auth Failed Fix
Docker Permission Denied Error When Mounting Volumes
How to Fix Antivirus Blocking Internet on Windows 11
Docker Compose .env File Not Working
Docker Bind Mount Permission Error Checklist
Fix VS Code Breakpoints Not Working in SSH/Container
Fix npm run build Failure from Missing Env Variables
Resolve Chrome Access Violation After Update
Fix Docker Desktop Engine Stopped Hyper-V Error
Fix Windows Explorer Restarting: Performance Troubleshooting Guide
Resolve Chrome Status Access Violation Error Guide
VS Code Git Auth Failed Fix
Docker Permission Denied Error When Mounting Volumes
How to Fix Antivirus Blocking Internet on Windows 11
Docker Compose .env File Not Working
Docker Bind Mount Permission Error Checklist
Fix VS Code Breakpoints Not Working in SSH/Container