PHP Mismatch 7.4 web, 8.1 system

Hi all. After following all instructions to upgrade to PHP 8.1 I am getting a PHP mismatch.

The about in the web interface states PHP 7.4 still. The ./validate.php says I am running 8.1.

How do I address the web interface PHP? I am running Ubuntu 18.04 still. Will tackle upgrading that after I resolve this. NOT a linux guy!

Check your php-fpm setup from the doco, or shortcut it with this:

Thanks for the reply. I followed that to the letter, but there must be something funky with my install. It was an appliance originally. The other issue is the machine is 18.04 so do not know if the instructions would be slightly different?