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 notesHow to Fix Nginx Redirect Loop That Prevents Site Loading
You open your site, and the browser keeps loading until it times out or shows a redirect error. T...
Fix 'pip install externally managed environment' Error
If you're seeing pip install fail with a message about an externally managed env...
Fix Chrome Status Access Violation Registry Error
You open Chrome and see an error like STATUS_ACCESS_VIOLATION or a crash with that c...
Resolving Python Dependency Conflicts in Docker Containers
You build a Docker image, run the container, and Python crashes with an ImportError or a version ...
Fix Python Permission Denied When Installing Packages on Mac
If you see a 'permission denied' error when running pip install somepackage ...
Issue queue
SitemapHow to Fix Windows 11 Update Hanging at 0%
Resolve NET::ERR_CERT_AUTHORITY_INVALID on Managed Devices
How to Stop Antivirus Blocking Windows 11 Installation
Fixing Cloudflare 521 Error: Enable Origin Pull Setup
Chrome Extensions Grayed Out? Troubleshooting Guide
pnpm ERR! Cannot Find Module – Troubleshooting Guide
Troubleshoot Windows Defender Real-Time Protection
Resolve Git index.lock Error – Step-by-Step Guide
How to Fix Docker Build Timeout on Network Shares
VS Code Source Control Stuck After Changing Branches
Troubleshoot Windows 10 Shared Folder Access Denied
How to Fix Git Refusing to Merge Unrelated Histories
Resolve NET::ERR_CERT_AUTHORITY_INVALID on Managed Devices
How to Stop Antivirus Blocking Windows 11 Installation
Fixing Cloudflare 521 Error: Enable Origin Pull Setup
Chrome Extensions Grayed Out? Troubleshooting Guide
pnpm ERR! Cannot Find Module – Troubleshooting Guide
Troubleshoot Windows Defender Real-Time Protection
Resolve Git index.lock Error – Step-by-Step Guide
How to Fix Docker Build Timeout on Network Shares
VS Code Source Control Stuck After Changing Branches
Troubleshoot Windows 10 Shared Folder Access Denied
How to Fix Git Refusing to Merge Unrelated Histories