Hey there. My host let me know that my site is failing to upgrade to PHP 8.1 due to this error. Is there a simple way to modify code to fix?

mod_fcgid: stderr: PHP Fatal error:  Uncaught Error: Attempt to modify
property "admin_notices" on null in
/home/derekveenhof/www.shapestate.ca/wp-content/themes/salient/nectar/redux-framework/ReduxCore/inc/class.redux_filesystem.php:29

Thanks!

Just to report back I figured it out. I had not updated the theme to the latest version. Hopefully my error helps someone else here!