title: 'Psr\Http\Message\RequestInterface' not found
body: <p>I'm trying to use <code>cpanel</code> <code>cron-job</code> to run a <code>PHP</code> script to automatically download email attachment and send some file via amazon web service. but, I'm getting this error instead :</p>
  
  <pre><code>PHP Fatal error:  Interface 'Psr\Http\Message\RequestInterface' not found in 
  /home/admin/public_html/main/vendor/guzzlehttp/psr7/src/Request.php on line 13
  </code></pre>
  
  <p>it works absolutely fine when I run the script in my local machine. it only happens in <code>cpanel</code>.</p>
  
  <p>I've no idea how to solve this error. I've tried to google it but couldn't find any answer, and honestly speaking, I don't even know what's causes this error. can anyone help?</p>