Try now
$ yum install unzip || apt install unzip
$ cd /usr/local/CyberCP/public/
$ rm -rf phpmyadmin
$ wget -cO - https://files.phpmyadmin.net/phpMyAdmin/5.2.1/phpMyAdmin-5.2.1-all-languages.zip > phpmyadmin.zip
$ unzip phpmyadmin.zip
You can try access phpmyadmin via https://SERVER_URL:8090/phpmyadmin/index.php
or go to Databases → PHPMYAdmin
See this to make sure your root password is same everywhere: