After printing an image label we get a blank page.

we solved the issue with this fix

/**
* Compress a row of ASCII hexadecimal data.
*
* @param string $row
* @param string $lastRow
* @return string
*/
protected function compress($row, $lastRow)
{
//if ($row === $lastRow) {
// return ':';
//}

    $row = $this->compressTrailingZerosOrOnes($row);
    $row = $this->compressRepeatingCharacters($row);

    return $row;
}