Practical software fixes, setup guides, and tool workflows.

Clear technical guides for everyday software errors, configuration problems, and productivity tools.

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Latest Troubleshooting Guides

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Troubleshooting

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Troubleshooting

How to Fix Firefox Secure Connection Failed with VPN

You're using a VPN and Firefox suddenly shows 'Secure Connection Failed' on sites tha...

Troubleshooting

How to Fix VS Code Source Control Not Detecting Changes

You open VS Code, edit a file, and expect to see it in the Source Control view. But the panel sta...

Troubleshooting

Fix DNS Probe Finished NXDOMAIN on Google DNS Setup

If you see "DNS probe finished NXDOMAIN" in your browser, it means your device couldn'...

Troubleshooting

Fix pnpm ERR_PNPM_OUTDATED_LOCKFILE Lockfile Error

When running pnpm install or pnpm update, you may see:

ER...


                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Git Push Rejected Non Fast Forward Error
                                
You try to push your local commits to a remote repository and get: ! [rejected] —



        
            
                
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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.