ISPConfig: click database icon results in PHP version required message

Hello,
When I do navigate to "Sites" > "Databases" and click the database icon next to a database name, this results in the following error:

Code:

PHP 7.1.3+ is required.
Currently installed version is: 7.0.33-0+deb9u3

When I execute the php --version command, PHP will show version 7.3.27-1~deb10u1.

Code:

# php --version
PHP 7.3.27-1~deb10u1 (cli) (built: Feb 13 2021 16:31:40) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.27, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.3.27-1~deb10u1, Copyright (c) 1999-2018, by Zend Technologies

When I try this on my other ISPConfig server, then PHPMyAdmin will open.
When I look at the file "php" under "/var/lib/dpkg/alternatives" then this reveals version 7.0 and 7.3.

Code:

root@s1:/var/lib/dpkg/alternatives# cat php
auto
/usr/bin/php
php.1.gz
/usr/share/man/man1/php.1.gz

/usr/bin/php7.0
70
/usr/share/man/man1/php7.0.1.gz
/usr/bin/php7.3
73
/usr/share/man/man1/php7.3.1.gz

I am running ISPConfig 3.2.4 on Debian 10.9.
Is there something I need to change? I can run phpmyadmin without problems (when executed directly from the address bar).