Hello

thank you for the quick reply

I fixed th problem by doing so:

To eliminate thee array_merge() errors, edit the admin/customers.php file:

Find these lines:

Code:
$customer_info = array_merge($country, $info, $reviews);

$cInfo_array = array_merge($customers, $customer_info);


and change them to:

Code:
$customer_info = array_merge((array)$country, (array)$info, (array)$reviews);

$cInfo_array = array_merge((array)$customers, (array)$customer_info);