Fix Nginx Upstream Connection Refused & Upstream Not Found - How to Fix Git Merge Conflicts Between Two Branches-Fix Docker Desktop Engine Stopped Error (Firewall Block)
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.
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