500 Server Error formit2resource with Loggedin User

<?php
$doc = $modx->getObject('modResource',array('id'=>$hook->getValue('resource_id')));

if (empty($doc)){
    $doc = $modx->newObject('modResource');
    $doc->set('createdby', $modx->user->get('id'));
}
else{
    $doc->set('editedby', $modx->user->get('id'));
}

$allFormFields = $hook->getValues(); 
foreach ($allFormFields as $field=>$value)
{

   if ($field !== 'spam' && $field !== 'resource_id'){
         $doc->set($field, $value);
    }
}

$pagetitle=$doc->get('pagetitle');
$alias = $doc->cleanAlias($pagetitle);
$doc->set('alias',$alias);
$doc->set('published', '1');
$doc->set('template', '3');
$doc->set('isfolder', '0');
$doc->save();

foreach ($allFormFields as $field=>$value)
{
    if ($tv = $modx->getObject('modTemplateVar', array ('name'=>$field)))
    {
        /* handles checkboxes & multiple selects elements */
        if (is_array($value)) {
            $featureInsert = array();
            while (list($featureValue, $featureItem) = each($value)) {
                $featureInsert[count($featureInsert)] = $featureItem;
            }
            $value = implode('||',$featureInsert);
        }	
        $tv->setValue($doc->get('id'), $value);
        $tv->save();
    }
}

return true;

[[!FormIt? &hooks=`spam,formit2resourceVideo,email,redirect` &preHooks=`resource2formit`
   &redirectTo=`257` &resource2formitfields=`parent,pagetitle,content,introtext` &emailTpl=`emailNotifyAnswer` &emailTo=`[email protected]`]]

<h2>Video Details:</h2>
<p>[[+fi.error.error_message]]</p>
<form class="form" action="[[~[[*id]]]]" method="post">
    <input name="nospam:blank" type="hidden" />
    <input name="resource_id" type="hidden" value="[[+fi.id]]" />
    <label for="parent">
<table width="200" border="0">
  <tr>
    <td align="right"><label for="pagetitle">
        Video Title:
        <span class="error">[[+fi.error.pagetitle]]</span>
    </label></td>
    <td><input style="width:270px;" id="pagetitle" name="pagetitle:required" type="text" value="[[+fi.pagetitle]]" />
  </td>
  </tr>
  <tr>
    <td align="right"><label for="introtext">
        Video Description:
        <span class="error">[[+fi.error.introtext]]</span>
    </label></td>
    <td><textarea style="width:280px;margin-left:3px; margin-top:3px;" id="introtext" cols="30" rows="3" name="introtext:required:stripTags">[[+fi.introtext]]</textarea></td>
  </tr>
  <tr>
    <td> </td>
    <td>
<div class="form-buttons">
        <input style="margin-left:2px;" class="formbutton" type="submit" value="Next:" />
    </div></td>
  </tr>
</table> 
        <span class="error">[[+fi.error.parent]]</span>
    </label>
    <input style="display:none;" id="parent" name="parent:required" type="text" value="259" />	
	<br/>

    

</form>

[[!FormIt? &validate=
    `name:required,
     age:required:isNumber,
     department:required:ValidateDepartment`
     &customValidators=`ValidateDepartment=`accounting,sales` `
]]