phpMyFAQ

After creating a new FAQ in English, I go back in to edit the FAQ and
try to translate to French. If I click on the black button for translating,
and choose a new language from the dropdown,
the page goes blank and at the top just says "loading", and stays there.
Is this a bug?
If I go into the FAQ ...

We are running Debian with PHP version 7.3.19 but the setup code is
telling us "Sorry, but you need PHP 7.2.0 or later!"
What could be the problem?

PHP 7.3.19-1~deb10u1 (cli) (built: Jul 5 2020 06:46:45) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.19, Copyright (c) 1998-2018 Zend ...