It won’t let me customize the theme

I spoke to wordpress.com support and they told me that the problem is on the topic and to ask you for the solution, this is what they sent me

[24-May-2023 14:12:19 UTC] PHP Fatal error:? Uncaught TypeError: array_slice(): Argument #3 ($length) must be of type ?int, string given in /srv/htdocs/wp-content/themes/it-residence/inc/google-fonts.php:45 Stack trace: #0 /srv/htdocs/wp-content/themes/it-residence/inc/google-fonts.php(45): array_slice(Array, 0, ”) #1 /wordpress/core/6.2.2/wp-includes/class-wp-hook.php(308): itre_get_fonts(”) #2 /wordpress/core/6.2.2/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #3 /wordpress/core/6.2.2/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /wordpress/core/6.2.2/wp-admin/customize.php(123): do_action(‘customize_contr…’) #5 {main} ? thrown in /srv/htdocs/wp-content/themes/it-residence/inc/google-fonts.php on line 45

The page I need help with: [log in to see the link]