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Troubleshooting

Fix Cloudflare 521 Error Due to Server Overload

You see a Cloudflare 521 error page. The message says the web server is down. Often, this means y...

Troubleshooting

Fix VS Code Permission Denied Error Code 13

You open a file or run a task in VS Code and see Error: EACCES: permission denied, open ...


                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix ERR_CERT_AUTHORITY_INVALID on Localhost
                                
When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                How to Fix Windows Explorer Keeps Restarting
                                
If Windows Explorer (the desktop, taskbar, and file manager) keeps restarting, you'll see the...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Bluetooth Permission Denied Error on Windows 11
                                
If you see a "Bluetooth permission denied" error on Windows 11, it usually means somethin...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Nginx Upstream Connection Refused Behind Cloudflare
                                
If you see upstream connection refused in your Nginx error logs while using Cloudfla...



        
            
                
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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.