Error in PayPal payment module

-- url of the page with the problem -- : plugins\hikashoppayment\paypal\paypal.php
-- HikaShop version -- : 2.2.0
-- Joomla version -- : 2.5.11
-- PHP version -- : 5.4.16
-- Browser(s) name and version -- : unimportant
-- Error-message(debug-mod must be tuned on) -- : Error_message

in paypal.php in PayPal payment module there is undefined variable on line 355:

$email->body = str_replace('<br/>',"\r\n",JText::sprintf('PAYMENT_NOTIFICATION_STATUS','Paypal',$vars['payment_status'])).' '.JText::sprintf('ORDER_STATUS_CHANGED',$order->mail_status)."\r\n\r\n".$order_text;

Notice:  Undefined variable: order in C:\app\xampp\htdocs\joomla25\plugins\hikashoppayment\paypal\paypal.php on line 355
Notice:  Trying to get property of non-object in <b>C:\app\xampp\htdocs\joomla25\plugins\hikashoppayment\paypal\paypal.php on line 355

Hello, has this been uploaded to the package yet?

I'm wondering if this is the cause of continual "Undefined" errors in my Cart??

do I need to change something manually myself?