Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

Docker Build Context Canceled: Fix .dockerignore Mistakes

You're running docker build and after a long wait you see: context cance...

How to Fix Git Detached HEAD State and Undo Changes
You run git status and see something like "HEAD detached at abc123". This ha...

Fix Nginx 'Permission Denied' Upstream Errors
When Nginx logs permission denied while connecting to an upstream (e.g., a Unix sock...

Why npm Says 'package.json Not Found' and How to Fix It
You run npm install or npm start and get npm ERR! package.json no...

How to Fix Windows Update Service Not Running in Windows 10 If Windows Update isn't working and you see an error like "Windows Update service is not ...

Issue queue Sitemap ERR_NAME_NOT_RESOLVED Troubleshooting Steps Fix Git SSL 'unable to get local issuer' Error Why Docker Containers Exit Immediately on Linux VS Code Breakpoints Not Working in WSL? Here's How to Fix Docker Permission Denied on Mac Volumes Fix pnpm Missing Peer Dependency Warnings How to Fix pnpm 'Cannot Find Module' Error How to Fix Firefox Secure Connection Failed Error Complete Git LFS Installation Tutorial with Fixes Discord Black Screen? Turn Off Chrome Hardware Acceleration How to Merge Multiple .env Files in Docker Compose Fix Git Clone Timeout on macOS: Step-by-Step Guide Desk note Troubleshooting paths Home Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities