PHP 8.0 and WP 5.8

Hello WPMUDEV!

I am reporting two issues and seeking your advice too.

WordPress version: 5.8 Multisite
PHP version: 8.0.9

Two issues: PHP error and slow query.

The error messages are below.

Many thanks.

Mike

— PHP error notice —

unserialize(): Error at offset 11074 of 91290 bytes

wp-includes/functions.php:624
unserialize()
wp-includes/functions.php:624
maybe_unserialize()
wp-includes/option.php:1438
get_network_option()
wp-includes/option.php:1292
get_site_option()
wp-content/plugins/branda-white-labeling/inc/functions.php:67
branda_get_option()
wp-content/plugins/branda-white-labeling/inc/modules/admin/menu.php:1611
Branda_Admin_Menu->get_menu_settings()
wp-content/plugins/branda-white-labeling/inc/modules/admin/menu.php:265
Branda_Admin_Menu->get_menu_for_user()
wp-content/plugins/branda-white-labeling/inc/modules/admin/menu.php:260
Branda_Admin_Menu->get_menu_for_current_user()
wp-content/plugins/branda-white-labeling/inc/modules/admin/menu.php:1301
Branda_Admin_Menu->remove_permalinks_menu_item()
wp-includes/class-wp-hook.php:303
do_action('admin_menu')
wp-admin/includes/menu.php:155

— Slow Query —

SELECT meta_value
FROM cm_e02_sitemeta
WHERE meta_key = ‘ub_admin_footer’
AND site_id = 1

get_network_option()
wp-includes/option.php:1433
get_site_option()
wp-includes/option.php:1292
branda_get_option()
wp-content/plugins/branda-white-labeling/inc/functions.php:67
Branda_Helper->set_data()
wp-content/plugins/branda-white-labeling/inc/class-branda-helper.php:326
Branda_Helper->get_value()
wp-content/plugins/branda-white-labeling/inc/class-branda-helper.php:210
Branda_Admin_Footer->upgrade_options()
wp-content/plugins/branda-white-labeling/inc/modules/admin/footer.php:119
do_action('init')
wp-includes/plugin.php:470