Decode scriptPubKey failed on some txid

[jackyxie]

txid: 68f283ecda28bfaa3e2a79370b9fe7473143875a49c0dc817ba1c09cbdaf6572

code: showup " Newly Generated Coins"

<?php

use BitWasp\Bitcoin\Address\AddressCreator;

require __DIR__ . "/vendor/autoload.php";

$raw = '01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff0804fd68011c024705ffffffff0100f2052a01000000434104b43343369809f32af2ef87d75b86140358041f9cc70f3449cff407edf864a3b4b1042183cb0b1954e7f10698329d68785b344695a1f17aa858f6091bd9b14ff1ac00000000';
$tx = \BitWasp\Bitcoin\Transaction\TransactionFactory::fromHex($raw);

$addrCreator = new AddressCreator();
$result['txid'] = $tx->getTxId()->getHex();
foreach ($tx->getOutputs() as $key=>$output) {
    var_dump($output->getScript());
    try{
        $result['outputs'][$key]['address'] = $addrCreator->fromOutputScript($output->getScript())->getAddress();

    }catch (\Exception $e){
        var_dump($e->getMessage());
        $result['outputs'][$key]['address'] = 'Newly Generated Coins';
    }
    $result['outputs'][$key]['value'] = $output->getValue() / 100000000;
}

die(print_r($result));

tx data:

{
    "result": {
        "txid": "68f283ecda28bfaa3e2a79370b9fe7473143875a49c0dc817ba1c09cbdaf6572",
        "hash": "68f283ecda28bfaa3e2a79370b9fe7473143875a49c0dc817ba1c09cbdaf6572",
        "version": 1,
        "size": 135,
        "vsize": 135,
        "weight": 540,
        "locktime": 0,
        "vin": [
            {
                "coinbase": "04fd68011c024705",
                "sequence": 4294967295
            }
        ],
        "vout": [
            {
                "value": 50.00000000,
                "n": 0,
                "scriptPubKey": {
                    "asm": "04b43343369809f32af2ef87d75b86140358041f9cc70f3449cff407edf864a3b4b1042183cb0b1954e7f10698329d68785b344695a1f17aa858f6091bd9b14ff1 OP_CHECKSIG",
                    "hex": "4104b43343369809f32af2ef87d75b86140358041f9cc70f3449cff407edf864a3b4b1042183cb0b1954e7f10698329d68785b344695a1f17aa858f6091bd9b14ff1ac",
                    "type": "pubkey"
                }
            }
        ],
        "hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff0804fd68011c024705ffffffff0100f2052a01000000434104b43343369809f32af2ef87d75b86140358041f9cc70f3449cff407edf864a3b4b1042183cb0b1954e7f10698329d68785b344695a1f17aa858f6091bd9b14ff1ac00000000",
        "blockhash": "00000000002b8cd0faa58444df3ba2a22af2b5838c7e4a5b687444f913a575c2",
        "confirmations": 638885,
        "time": 1279986642,
        "blocktime": 1279986642
    },
    "error": null,
    "id": "curltest"
}