Fix Docker Nginx 502 Bad Gateway with MySQL - Resolve Nginx 502 with Docker and PHP-FPM-How to Fix Chrome ERR_CONNECTION_RESET When VPN Is On

Updated 2026-07-28 10:31:35browser-issues

Fix Docker Nginx 502 Bad Gateway with MySQL - Resolve Nginx 502 with Docker and PHP-FPM-How to Fix Chrome ERR_CONNECTION_RESET When VPN Is On

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.