Problem in Featured Videos !

[mlook_ahmar]

Hello i have bought before vshare latest version ! this is my site jordantube.info
there is problem in Featured Videos in my homepage the videos are stoped from changed since i created my site ! and no videos are showed in my admin page for Featured Videos Featured Videos (0) !

jordantube.info
this error appear when i click on (Feature Requests) at the admin panel

Fatal error: Call to undefined function mb_split() in /home//public_html/include/smarty/libs/plugins/shared.mb_str_replace.php on line 30

Thanks

[vshare2]

Please open a Support ticket with your site admin and FTP login details.

Thanks,