Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Nginx 502 Bad Gateway: PHP-FPM Fix Guide

Seeing a 502 Bad Gateway error from Nginx usually means it can't reach PHP-FPM. This is common af...

Fix Port Already Allocated Error in Windows Security Configuration

When configuring Windows Firewall or security policies, you might see a "port already allocated" ...

Fix Windows Security Proxy 504 Gateway Timeout Configuration

When Windows Security (Windows Defender) reports a 504 Gateway Timeout error through a proxy, it ...

Fix Windows Security 504 Gateway Timeout After Reset Settings

If you've reset Windows Security settings and now see a 504 gateway timeout error when opening th...

How to Fix Git SSL Certificate Problem on Linux

When you see fatal: unable to access 'https://...': SSL certificate problem: unable to get ...

Fix Windows Search Dependency Conflict Sync Issues
You open Windows Search and nothing happens, or sync keeps failing. Often the culprit is a depend...