Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

How to Fix Cloudflare Origin Certificate Validation Failed

If you see a "validation failed" error when setting up or using a Cloudflare Origin Certi...

Fix ERR_NAME_NOT_RESOLVED with ipconfig /flushdns in Chrome

When Chrome shows ERR_NAME_NOT_RESOLVED, it means the browser couldn't trans...

Fix 'npm package json not found' Error When Using npx

When you run npx some-package and see an error like “npm package json not found”...

Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused

How to Fix Limited Connectivity on Windows 11 Wi-Fi You connect to Wi-Fi but see "Limited connectivity" or "No internet, secured." Yo...

Chrome Black Screen Fix When Hardware Acceleration Is On If Chrome shows a black screen, flickers, or freezes after you enable hardware acceleration, you&...

Issue queue Sitemap Node Sass Build Failed: Complete Troubleshooting Checklist PyCharm Virtual Environment Not Activating? Try These Fixes Fix npm install Permission Denied (EACCES) Error Nginx 502 Bad Gateway: Upstream Connection Refused Fix How to Fix Windows Search Indexing Not Working Fixing Python UnicodeDecodeError in Logging Handlers Fix Nginx Upstream Connection Refused on Port 80 How to Set Up a Wildcard Subdomain DNS Record in Cloudflare Windows 11 Update Stuck: Permission Denied Troubleshooting How to Set Environment Variables in Docker Compose Fix Windows Update Service Not Running via Registry VS Code Terminal Not Opening on Mac: Troubleshooting Guide Desk note Troubleshooting paths Home Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities