Critical error after automatic Site Kit update

Hello,
Just after the automatic update of Site Kit last night to 1.149.0 version, we received the following critical PHP error message by e-mail:

“Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function “handle_failed_email” not found or invalid function name in /app/www/wp-includes/class-wp-hook.php:324 Stack trace: #0 /app/www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array) #1 /app/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /app/www/wp-includes/pluggable.php(581): do_action(‘wp_mail_failed’, Object(WP_Error)) #3 /app/www/wp-admin/includes/class-wp-automatic-updater.php(1524): wp_mail(Array, ‘[website_name] Cert…’, ‘Bonjour\xC2\xA0! Des …’, Array) #4 /app/www/wp-admin/includes/class-wp-automatic-updater.php(1207): WP_Automatic_Updater->send_plugin_theme_email(‘success’, Array, Array) #5 /app/www/wp-admin/includes/class-wp-automatic-updater.php(773): WP_Automatic_Updater->after_plugin_theme_update(Array) #6 /app/www/wp-includes/update.php(851): WP_Automatic_Updater->run() #7 /app/www/wp-includes/class-wp-hook.php(324): wp_maybe_auto_update(”) #8 /app/www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array) #9 /app/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #10 /app/www/wp-includes/update.php(295): do_action(‘wp_maybe_auto_u…’) #11 /app/www/wp-includes/class-wp-hook.php(324): wp_version_check() #12 /app/www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array) #13 /app/www/wp-includes/plugin.php(565): WP_Hook->do_action(Array) #14 /app/www/wp-cron.php(191): do_action_ref_array(‘wp_version_chec…’, Array) #15 {main} thrown.”

Can you tell me what caused this error?

Thanks for your help!

Sérey