1) In the configuration file, you must set the passphrase (blowfish_secret).
2) Used by the setup script, the config directory is still in the installation directory of phpMyAdmin. Be sure to remove it immediately after configuring phpMyAdmin. Otherwise the security of your server can be compromised through free access to download the configuration file.
3) $Cfg['TempDir'] (./tmp/) is not available. Because of this, phpMyAdmin is unable to cache template and will be slow.