Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix Git Clone Connection Timed Out via HTTPS

When cloning a repository over HTTPS, you may see 'Connection timed out' after a long wai...

Fix Chrome Certificate Error Invalid Authority on Mac

You're browsing in Chrome on a Mac and suddenly see a warning: Your connection is not...

Fix Node Sass Build Failure: Environment Variable Errors
When you run npm install or a build script and see an error like Node Sass doe...

How to Fix Nginx 'Upstream Connection Refused' Error When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...

Fix Git SSL Certificate Error: Unable to Get Local Issuer Certificate When cloning or pulling from a Git repository, you may see: fatal: unable to access...

Chrome Certificate Error Invalid Authority: Diagnosis Checklist When Chrome shows NET::ERR_CERT_AUTHORITY_INVALID and refuses to load a site, it...

Issue queue Sitemap Fix Docker Exit Code 137 (OOM Killer) Cloudflare Full Strict SSL: Origin Server Fixes Troubleshooting Nginx 502: Backend Connection Refused Troubleshooting Docker Compose Port Allocation Fix Docker Desktop Engine Not Running on Windows Fix 'pip externally managed environment' Error for venv Setup Fix npm install Permission Denied Errors on package.json Reinstall Microsoft Defender Windows Security Fix 'fatal: refusing to merge unrelated histories' in Git Troubleshoot Cloudflare 521 and Proxy Issues Fix fatal: refusing to merge unrelated histories error Windows 11 BSOD After Update: Bootable USB Repair Guide Desk note Troubleshooting paths Home Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities