Multilang {locale} url + Google SEO Meta tags

Hello, i founded localization by video its very good integration to CI4 who want all pages will be founded by Google by metactags and by all Languages.
Only one problem i cant figure out why this source code not working for me and CI4 write error on this Model 

PHP Code:

$this->model = new \App\Models\CommonModel(); 


Maybe some one can help to configure this multilang source code??

This multilang written on older CI4 version

https://www.youtube.com/watch?v=CTb9ZqUM2Hw

https://skachgroup.ru/files/notebook/multilang.zip