If I upgrade to PHP 8 with Genesis Sample I get the following error

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If I upgrade to PHP 8 with Genesis Sample I get the following error:

[28-May-2023 19:52:28 UTC] PHP Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/widgets.php:1342
Stack trace:
#0 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/widgets.php(1342): array_merge()
#1 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/widgets.php(1287): retrieve_widgets()
#2 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/class-wp-hook.php(310): _wp_sidebars_changed()
#3 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#4 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action()
#5 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/theme.php(3401): do_action()
#6 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/class-wp-hook.php(308): check_theme_switched()
#7 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#8 /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action()
#9 /var/www/vhosts/shishmahal.es/httpdocs/wp-settings.php(623): do_action()
#10 /var/www/vhosts/shishmahal.es/httpdocs/wp-config.php(106): require_once('...')
#11 /var/www/vhosts/shishmahal.es/httpdocs/wp-load.php(50): require_once('...')
#12 /var/www/vhosts/shishmahal.es/httpdocs/wp-blog-header.php(13): require_once('...')
#13 /var/www/vhosts/shishmahal.es/httpdocs/index.php(17): require('...')
#14 {main}
thrown in /var/www/vhosts/shishmahal.es/httpdocs/wp-includes/widgets.php on line 1342

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