Error on Theme Directory : Cannot Select Themes

Hi Everyone!

I tried to search in the forum for the answer but I failed.

I have a problem regarding the Theme Directory Selector , I cannot select any theme.

On top of my screen there is an error indicating this problem.

Warning: Invalid argument supplied for foreach() in /var/www/vhosts/WEBSITE/admin/controller/extension/theme/theme_default.php on line 168

This is the code that I found :
foreach ($directories as $directory) {
$data['directories'][] = basename($directory);
}

I am using OC ver 2.3.0.2.

Thanks in advanced for the replies