https://propk.ru/phpmyadmin-debian-10/ mht - Устанавливаем PhpMyAdmin в Debian 10

https://github.com/xzilla/phppgadmin - git-репозитарий

в файле congif.inc.php настроить параметры, особенно $conf['servers'][0]['host'] = 'localhost';

/etc/apache2/conf-available/phppgadmin.conf

<Directory /usr/share/phppgadmin>
....
Require all granted
....
</Directory>

https://ru.stackoverflow.com/questions/881755/Ошибка-phpmyadmin - phpmyadmin Warning in ./libraries/sql.lib.php#613 count(): Parameter must be an array or an object that implements Count