error when trying to test email

[techteam2001]

I encounter this error after update to 5.5 when we tried to test send out email
*domain url is hidden for privacy

2020-08-13T04:32:17+00:00 CRITICAL Uncaught Error: Call to a member function is_manual() on boolean in /home/xxxx/xxxx.com/wp-content/plugins/woocommerce/includes/admin/settings/class-wc-settings-emails.php:300
Stack trace:
#0 /home/xxxx/xxxx.com/wp-includes/class-wp-hook.php(287): WC_Settings_Emails->email_notification_setting(Array)
#1 /home/xxxx/xxxx.com/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(, Array)
#2 /home/xxxx/xxxx.com/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /home/xxxx/xxxx.com/wp-content/plugins/woocommerce/includes/admin/class-wc-admin-settings.php(679): do_action('woocommerce_adm...', Array)
#4 /home/xxxx/xxxx.com/wp-content/plugins/woocommerce/includes/admin/settings/class-wc-settings-emails.php(219): WC_Admin_Settings::output_fields(Array)
#5 /home/xxxx/xxxx.com/wp-includes/class-wp-hook.php(287): WC_Settings_Emails->output()
#6 /home/xxxx/xxxx.com/wp-includes/cla in /home/xxxx/xxxx.com/wp-content/plugins/woocommerce/includes/admin/settings/class-wc-settings-emails.php on line 300

[mukesh27]

Hi there, Welcome to WordPress Trac! Thanks for the ticket.

Please note that this Trac is used for enhancements and bug reporting for the WordPress core software, not for individual support questions.

Please try the plugin support forums to get help with your site: ​https://wordpress.org/support/plugin/woocommerce/

Feel free to reopen with more details if it turns out to be an issue in WordPress core.

[techteam2001]

The WooCommerce was working well, the issue happen after update to WordPress 5.5 today. So that mean it is still the Plugin issue?