Software troubleshooting desk

Practical fixes for tool errors, setup blocks, and workflow issues.

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fix Cloudflare Wildcard Subdomain Redirect Loop

If you're seeing a redirect loop when accessing subdomains like app.yourdomain.com

Fixing Nginx Permission Denied on Mounted Drive
When you mount an external drive and point Nginx to serve files from it, you may get a 403 Forbid...

How to Fix 'fatal: refusing to merge unrelated histories' in Git
If you see fatal: refusing to merge unrelated histories when running git merge...

Fix Docker Compose Volume Permission Denied Errors
You run docker compose up and see errors like Permission denied when a ...

Python Virtual Environment Not Activating: Common Fixes
You run source venv/bin/activate (or venv\Scripts\activate on Windows) ...


    Issue queue
Sitemap
How to Fix DNS Probe Finished NXDOMAIN on Windows 10
Switching from Cloudflare Origin Certificate to Let's Encrypt
Resolve Docker Compose Nginx Port Conflict
Fix Node Sass Build Failures: Alternatives and Migrations
How to Access a Shared Folder on Network in Windows 10
Troubleshooting RDP Failure After a System Update
Resolve Chrome Sync Issues Across Profiles
Python Not Recognized on Windows After Install
How to Resolve Nginx Socket Connection Refused
Fix npm install Permission Denied on Windows 10
How to Fix Network Path Not Found Error 0x80070035
Fix Angular Breakpoints Not Hit in VS Code
Desk note

    Troubleshooting paths
Home
Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities