How to Fix Nginx Upstream Connection Refused on Port 80 - How to Fix Chrome Startup Crash (No Error Message)-Fix Nginx Permission Denied on CentOS: A Practical Guide
Before changing system settings, save your work and note the exact error text so you can compare results after each step.
Extra verification checklist
- Restart the affected app after changing permissions or configuration files.
- Test the same workflow in a clean browser profile or a temporary user account.
- Compare the result on another network if the error may be connection related.