Selecting PHP7.3 and below

When I try to select PHP7.3 (shown in the dropdown box) or below, I get the following message:
cat: /usr/local/lsws/lsphp73/etc/php/7.3/litespeed/php.ini: No such file or directory

Is there a solution please? I need the lower version of PHP in order to run a slightly older program.
Thanks for any help

choose php7.3 then save

thank you very much