Can you help me to solve this error?

Question

Fatal error: Class 'Helper_Data' not found in app\Mage.php

Fatal error: Class 'Mage_Parcelamento_Helper_Data' not found in

C:\wamp64\www\magento\app\Mage.php on line 547

Error log:

Warning: include(Mage\Parcelamento\Helper\Data.php): failed to open stream: No such file or directory in lib\Varien\Autoload.php on line 94

I did what you said, but it's still with the same error.

https://drive.google.com/open?id=0B66I9AyUOaAnS21VMmNFSlEwSEk

Answer 1

Your extension is calling helper data from extension Bizcommerce_Parcelamento So you need to integrate this extension too.

If you check this class

class FLB_Cielo_Block_Form_Cc extends Mage_Payment_Block_Form_Cc {

    /** @var Bizcommerce_Parcelamento_Helper_Data */
    private $_parcelamento = null;

    protected function _construct() {
        parent::_construct();
        $this->_parcelamento = Mage::helper('parcelamento');
        $this->setTemplate('cielo/form/cc.phtml');
        $this->setModuleName('Mage_Payment');
    }

public function getParcelas() {
...

        $this->_parcelamento->numparcelas = $maxParcelas;
        $this->_parcelamento->parcelaMinima = $valorMinimo;
        $this->_parcelamento->juros = $taxaJuros;
        $this->_parcelamento->tipoJuros = $tipoJuros;
        $this->_parcelamento->numParcelasSemJuros = $parcelasSemJuros;
        $this->_parcelamento->descontoPrimeiraParcela = $descontoPrimeiraParcela;
        $parcelamento = $this->_parcelamento->getParcelamentosPossiveis($total);

}

Data are getting called from this helper data which is not found so you are getting the error Mage_Parcelamento_Helper_Data not found.

Hope this helps.