Magento 2 Installation - Key must not exceed 56 bytes
<p>I'm having issues installing Magento 2 via command line. When setup is running it gets to:</p>

<p>Module 'Magento_Indexer':
Running recurring..</p>

<p>And it throws an error:</p>

<blockquote>
  <p>[Magento\Framework\Exception\LocalizedException]<br>
  Key must not exceed 56 bytes.</p>
</blockquote>

<p>I have searched around and couldn't find any clues as to what it can be. I thought the --key might be too long for Magento setup but I have tried the setup without --key, as it is optional but the error still occurs.</p>

<blockquote>
  <p>2016/07/08 14:42:49 [error] 30074#30074: *1 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Uncaught exception 'Magento\Framework\Exception\LocalizedException' with message 'Key must not exceed 56 bytes.' in /magento/lib/internal/Magento/Framework/Encryption/Crypt.php:58
  Stack trace:</p>
  
  <p>0 /magento/lib/internal/Magento/Framework/Encryption/Encryptor.php(401): Magento\Framework\Encryption\Crypt->__construct('oon5eeRee7yiemo...', 'blowfish', 'ecb', false)</p>
  
  <p>1 /magento/lib/internal/Magento/Framework/Encryption/Encryptor.php(313): Magento\Framework\Encryption\Encryptor->getCrypt('oon5eeRee7yiemo...', 0, false)</p>
  
  <p>2 /magento/app/code/Magento/Config/Model/Config/Backend/Encrypted.php(107): Magento\Framework\Encryption\Encryptor->decrypt('PayPal')</p>
  
  <p>3 /magento/lib/internal/Magento/Framework/App/Config/MetadataProcessor.php(86): Magento\Config\Model\Config\Backend\Encrypted->processValue('PayPal')</p>
  
  <p>4 /magento/lib/internal/Magento/Framework/App/Config/Data.php(32): Magento\Framework\App\Config\MetadataPr" while reading response header from upstream, client: 127.0.0.1, server: www.magentotest.com, request: "GET /setup/ HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.magentotest.com"</p>
</blockquote>

<p>If anyone could help that would be great, thank you!</p>