Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
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 VS Code Terminal Not Opening
If you click the terminal panel in VS Code and nothing appears, or it opens but stays blank, the ...
VS Code Source Control Not Detecting Changes After Git Reinstall
If you reinstalled Git and VS Code's Source Control panel stopped detecting file changes, you...
Fix Windows Search Indexing Stuck: Practical Steps
Windows Search stops indexing files or shows 'Indexing not running' or 'Indexing paus...
Fix Docker Permission Denied Errors on Ubuntu
You start a Docker container with a mounted volume, and get a permission denied error when the co...
Fix Git Push Rejected Due to Unrelated Histories
You try to push a local branch to a remote repository, but Git refuses with a message like ...
Issue queue
SitemapFix Windows Update Error 0x800f081f After SFC ScanNow
Windows Defender Real-Time Protection Registry Fix Guide
Fix Python Permission Denied on pip install --no-cache-dir
Windows 11 Update Causing Blue Screen? Try a Clean Boot
How to Fix DNS Probe Finished NXDOMAIN and Server Not Found
Docker Compose Secret vs Environment Variable: When to Use Each
Windows 7 Chrome Access Violation: Causes and Solutions
Fix Windows Cannot Access Shared Folder HomeGroup
Fix Windows Update Error 0x80070002: Missing File
Edge Sync Stuck on Sign In: How to Break the Loop
Chrome Android Certificate Authority Invalid Error Fix
Troubleshoot Nginx SSL Redirect Loop
Windows Defender Real-Time Protection Registry Fix Guide
Fix Python Permission Denied on pip install --no-cache-dir
Windows 11 Update Causing Blue Screen? Try a Clean Boot
How to Fix DNS Probe Finished NXDOMAIN and Server Not Found
Docker Compose Secret vs Environment Variable: When to Use Each
Windows 7 Chrome Access Violation: Causes and Solutions
Fix Windows Cannot Access Shared Folder HomeGroup
Fix Windows Update Error 0x80070002: Missing File
Edge Sync Stuck on Sign In: How to Break the Loop
Chrome Android Certificate Authority Invalid Error Fix
Troubleshoot Nginx SSL Redirect Loop