MultiSafePay Msp

1. Open app/code/community/MultiSafepay/Msp/controllers/StandardController.php and find the following line:

   $this->_redirect("checkout?utm_nooverride=1", array("_secure" => true));
   

   Replace it with:

   $url = Mage::helper('checkout/url')->getCheckoutUrl();
   $this->_redirectUrl($url . "?utm_nooverride=1");
   

2. Open app/code/community/MultiSafepay/Msp/controllers/CheckoutController.php and find the following line:

   $this->_redirect("checkout", array("_secure" => true));
   

   Replace it with:

   $this->_redirectUrl(Mage::helper('checkout/url')->getCheckoutUrl());
   

3. Save the files, disable compilation, clear cache.