JMAZZ

I am getting a critical error when PHP was upgraded to version 8. apparently it is in the theme and related to case insensitive. I really need assistance to fix.

This is the error that I see from CLI:
PHP Warning: define(): Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported in /www/fleurieufoodandwinecomau_505/public/wp-content/themes/ftravel-holiday-pro/inc/custom-functions-customizer.php on line 979
Warning: define(): Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported in /www/fleurieufoodandwinecomau_505/public/wp-content/themes/ftravel-holiday-pro/inc/custom-functions-customizer.php on line 979