I am using Site Category Plugin for my site, it used

I am using Site Category Plugin for my site, it used to work and show on sign up page of my wp site however i think after i switched my wp to persian language it stopped working, the categories still shows on sign up page which is located at /wp-signup.php (shows on second step). but after a user sign up and confirm his email the site never shows in the selected category.

My only guess is that it stopped working cos of language change. i do not show any errors in error logs, if you need wp and ftp access i can send them to you.

Thanks.