[ 解決済 ] vk-all-in-one-expansion-unitでCall to undefined function vkExUnit_register

wordpressをマルチサイト化で作成し、サイトを追加したあとに上記エラーが発生し
プラグインが利用できない状態です。

環境：wordpress バージョン 5.3.2

■対処手順
vk-all-in-one-expansion-unit　プラグインを削除
wordpressを最新化
vk-all-in-one-expansion-unit　プラグイン更新
エラー解消せず

Fatal error: Uncaught Error: Call to undefined function vkExUnit_register_setting() in 
/home/xxxxxx/0/xxxxxx/web/wp-content/plugins/vk-all-in-one-expansion-unit/inc/wp-title.php:16 Stack trace: #0 
/home/xxxxxx/0/xxxxxx/web/wp-includes/class-wp-hook.php(288): vkExUnit_wp_title_init('') 
#1 /home/xxxxxx/0/xxxxxx/web/wp-includes/class-wp-hook.php(312):WP_Hook->apply_filters('', Array) #2 /home/users/0/xxxxxx/web/wp-includes/plugin.php(478): WP_Hook->do_action(Array) 
#3 /home/users/0/xxxxxx/web/wp-content/plugins/vk-all-in-one-expansion-unit/veu-package-manager.php(28): do_action('veu_package_ini...') 
#4 /home/users/0/xxxxxx/web/wp-includes/class-wp-hook.php(288): veu_package_init('') 
#5 /home/users/0/xxxxxx/web/wp-includes/class-wp-hook.php(312):
WP_Hook->apply_filters(NULL, Array) #6 /home/users/0/xxxxxx/web/wp-includes/plugin.php(478): WP_Hook->do_action(Array) 
#7 /home/users/0/xxxxxx/web/wp-settings.php(523):do_action('init') 
#8 /home/users/0/xxxxxx in /home/users/0/xxxxxx/web/wp-content/plugins/vk-all-in-one-expansion-unit/inc/wp-title.php on line 16