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Latest Troubleshooting Guides

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Troubleshooting

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Troubleshooting

Fix Nginx Upstream Connection Refused Timeout Error

When Nginx returns 502 Bad Gateway or logs upstream connection refused timeout...


                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Firefox Secure Connection Failed After Update
                                
After a Firefox update, you might see a "Secure Connection Failed" error when visiting we...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Externally Managed Error: Create Virtual Environment
                                
If you're on a modern Linux distribution and try to install a Python package with pip, you ma...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Git index.lock File Exists: Quick Fix Checklist
                                
You try to run a Git command and see fatal: Unable to create 'path/.git/index.lock'...

                            

                        
                    

                    
                    
                        
                            
                            
                                Troubleshooting
                                How to Merge a Git Detached HEAD Back to Master
                                
If you see a message like 'You are in 'detached HEAD' state' after checking out a...



        
            
                
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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.