I purchased Roneous – Creative Multi-Purpose WordPress Theme a couple of days back. Today when I tried to install this theme, it is showing different errors. I AM NOT ABLE TO INSTALL. Details are below.

PLEASE HELP!!

The versions are:-
Wordpress Version 5.5.3
PHP version 8.0.0 (Supports 64bit values)

SEE THE ERROR BELOW.

Fatal error: Uncaught ArgumentCountError: array_merge() does not accept unknown named parameters in C:\xampp\xam\htdocs\digitalstardom\wp-includes\widgets.php:1265 Stack trace: #0 C:\xampp\xam\htdocs\digitalstardom\wp-includes\widgets.php(1265): array_merge(wp_inactive_widgets: Array, primary: Array, page: Array, shop: Array, footer1: Array, footer2: Array, footer3: Array, footer4: Array) #1 C:\xampp\xam\htdocs\digitalstardom\wp-includes\widgets.php(1220): retrieve_widgets(true) #2 C:\xampp\xam\htdocs\digitalstardom\wp-includes\class-wp-hook.php(289): _wp_sidebars_changed(‘Roneous’) #3 C:\xampp\xam\htdocs\digitalstardom\wp-includes\class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #4 C:\xampp\xam\htdocs\digitalstardom\wp-includes\plugin.php(478): WP_Hook->do_action(Array) #5 C:\xampp\xam\htdocs\digitalstardom\wp-includes\theme.php(3267): do_action(‘after_switch_th…’, ‘Roneous’, Object(WP_Theme)) #6 C:\xampp\xam\htdocs\digitalstardom\wp-includes\class-wp-hook.php(287): check_theme_switched(”) #7 C:\xampp\xam\htdocs\digitalstardom\wp-includes\class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #8 C:\xampp\xam\htdocs\digitalstardom\wp-includes\plugin.php(478): WP_Hook->do_action(Array) #9 C:\xampp\xam\htdocs\digitalstardom\wp-settings.php(546): do_action(‘init’) #10 C:\xampp\xam\htdocs\digitalstardom\wp-config.php(90): require_once(‘C:\\xampp\\xam\\ht…’) #11 C:\xampp\xam\htdocs\digitalstardom\wp-load.php(37): require_once(‘C:\\xampp\\xam\\ht…’) #12 C:\xampp\xam\htdocs\digitalstardom\wp-admin\admin.php(34): require_once(‘C:\\xampp\\xam\\ht…’) #13 C:\xampp\xam\htdocs\digitalstardom\wp-admin\themes.php(10): require_once(‘C:\\xampp\\xam\\ht…’) #14 {main} thrown in C:\xampp\xam\htdocs\digitalstardom\wp-includes\widgets.php on line 1265