Nginx web server MariaDB/MySQL used for Wordpress database phpMyAdmin interface to connect to your MySQL database WP-Cli: Wordpress Command Line Interface Makefile directives for automatization.

This happens in 6.6-beta4, reverted to 6.5.5 on the same site, same settings, error was vanished. When I open the site editor (http://localhost:8881/wp-admin/site ...