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Troubleshooting

Fix Nginx 502 Bad Gateway: Upstream Connection Refused

If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...

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Fix npm install Permission Denied on Linux

When you run npm install on Linux and hit a permission denied error, it usually mean...

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How to Fix Windows Update Error 0x80070002 by Resetting Components

If you see error 0x80070002 when trying to run Windows Update, the system often cannot find or re...

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Fix Windows 11 Installation Assistant Stuck at 99% Registry

If the Windows 11 Installation Assistant gets stuck at 99% while processing registry entries, you...

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How to Fix a Detached HEAD in Git Using SourceTree

If you open SourceTree and see a message like “You are in ‘detached HEAD’ state,” it means your w...

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Fix 'Port Already Used by Another Container' in Docker Compose

When you run docker compose up and see an error like port is already allocated...



        
            
                
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                    Support Note
                     Test fixes in a non-critical profile first, keep backups for configuration files, and record exact error messages before changing settings.