Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix 'Python Is Not Recognized as an Internal or External Command'

When you type python in the Command Prompt and see 'python is not recognized...

Fix Nginx Configuration Test Failure on Location Directive
When you run nginx -t and see an error like [emerg] invalid location directive...

Fix Nginx 502 Bad Gateway on Docker Ubuntu You're running Nginx as a reverse proxy inside Docker on Ubuntu, and suddenly you see

Python Command Not Found in Windows Terminal: Fixes When you type python or python3 in Windows Command Prompt or PowerShell...

Fix DNS Probe Finished NXDOMAIN on Router: Step-by-Step You're browsing and suddenly Chrome shows 'DNS_PROBE_FINISHED_NXDOMAIN'. This means y...

Fixing Node Sass Build Failures on Linux If you're running npm install on a Linux machine and get a build failure for

Issue queue Sitemap Fix npm run build Failure Due to Node Version Mismatch Resolving Nginx Permission Denied Errors (www-data) Fix Windows 11 No Internet but Wi-Fi Connected DNS Issue Fix Windows 11 Installation Assistant Stuck at 99% in Safe Mode Resolve Cloudflare 521 Error on Wildcard Domains Python Requests Timeout Settings for Slow Networks Windows 10 Taskbar Icons Not Showing? Here's How to Fix It Fix Firefox Secure Connection Failed on Mac Resolve Docker Pull Access Denied Despite Successful Login Resolving npm Build Module Not Found Errors Resolving 'Unable to Create index.lock' in Git How to Resolve Nginx 502 Bad Gateway in Docker Desk note Troubleshooting paths Home Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities