MY WEBSTE NOT LOADING NEED TO UPDATE TO 8.3 OR 8.4

IN SITE HEALTH
WEBSITE NOT LOADING WHEN YOU CLICK ON THE LINK BUT IN GOOGLE SEARCH IF YOU CLICK ON CONTACT IT LOADS

PHP is one of the programming languages used to build WordPress. Newer versions of PHP receive regular security updates and may increase your site’s performance. The minimum recommended version of PHP is 8.3.

Background updates ensure that WordPress can auto-update if a security update is released for the version you are currently using.
* Error
 The WP_AUTO_UPDATE_CORE constant is defined as false
* Passed
 No version control systems were detected.
* Passed
 Your installation of WordPress does not require FTP credentials to perform updates.
* Passed
 All of your WordPress files are writable.
* Error
 WordPress security and maintenance releases are blocked by define( 'WP_AUTO_UPDATE_CORE', false );.

THE THEME NEEDS TO BE ABLE TO LOAD PHP TO 8.3 8.4 IF FORTUN CANT DO THAT WITH CODING YOU NEED TO MAKE MY WEBSITE WORK ON A NEW THEME I HAVE ONE BUT MY SITE IS TO STAY THE SAME SO LOOK AT THE LAYOUT OF MY WEBSITE DO NOT WANT T TO CHANGE
ALSO THE BUTTONS AT THE TOP MUSIC COACHELLA. FAB HOME FOR SALE DONT CLICK INTO NEW WINDOW I NEED TO NO HOW THIS WILL WORK AND MAKE IT CLICK TO NEW WINDOWS