Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix Nginx Upstream Connection Refused in Proxy Pass

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

How to Fix Cloudflare Error 521: Web Server Is Down
Cloudflare error 521 means your origin web server is refusing the connection from Cloudflare'...

Node Sass Build Failed: Complete Troubleshooting Checklist
When you see "Node Sass does not yet support your current environment" or a build failure...

Fix Git SSL Certificate Verify Failed: Unable to Get Local Issuer
When you see fatal: unable to access '...': SSL certificate problem: unable to get ...

Fixing NGINX 502 Bad Gateway in Docker Containers
When running NGINX as a reverse proxy in Docker, a 502 Bad Gateway error usually means NGINX cann...

Fix Nginx 502 Bad Gateway in Docker Containers
An Nginx 502 Bad Gateway error when proxying to a Docker container usually means Nginx cannot rea...


    Issue queue
Sitemap
Fix Git SSL Certificate Problem: Unable to Get Local Issuer
Fix Docker Compose 'Port Already Allocated' for MySQL
Windows Update Service Not Starting After SFC Scan Fix
How to Fix 'Git Remote Origin Already Exists' Error When Cloning
Restore Missing Bluetooth Icon in Windows 11
Fix Windows Update Service Not Running Due to Group Policy
Resolve Node Version Mismatch in npm install
Fix 'Permission Denied' When Running pip install --user
Resolve VSCode spawn ENOENT Terminal Error
Cloudflare SSL Full vs Flexible: Troubleshooting Mixed Content & Errors
Windows Explorer Keeps Restarting in Windows 11: Fixes
Resolving Git's Unrelated Histories Error
Desk note

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