Community Auth Learning...

FYI, this is my testing environment.
I'm using XAMPP with MariaDB it works the same with MySQL, since they ditch MySQL and replaced it with MariaDB.

I restarted XAMPP and turned on apache and MySQL (MariaDB) and visited this link below
http://localhost/phpmyadmin/

and no error show up, meaning MariaDB is working fine.
Currently using InnoDB engine in MariaDB, by the way InnoDB is also called xTraDB in MariaDB.

Perhaps you can try the latest XAMPP to test Community-Auth under it since MySQL is really getting rusty.
https://www.apachefriends.org/index.html

Will try to find out at my end as well the culprit.
Just in case you fixed the bug let me know as well.

thanks in advance.