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Troubleshooting

How to Fix Cloudflare 521 Error Due to Proxy Issues

If you see a Cloudflare 521 error, the message usually says something like “Web server is down.” ...

Troubleshooting

Fix Node.js Heap Out of Memory Error in PM2

If you're running a Node.js application under PM2 and seeing FATAL ERROR: CALL_AND_RETR...


                    
                    
                        
                            
                            
                                Troubleshooting
                                How to Enable Network Discovery for Shared Folder Access
                                
When you can't see other computers in File Explorer's Network section, or you get an erro...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Node Sass Build Failure on Windows 10
                                
If you see errors like Module build failed: Error: Node Sass does not yet support your curr...

                            

                        
                    

                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Nginx Upstream Connection Refused & Upstream Not Found
                                
When you see upstream connection refused or upstream not found in your ...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Python Permission Denied When Running pip install -r requirements.txt
                                
You run pip install -r requirements.txt and get a PermissionError or



        
            
                
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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.