Access Denied

I should add I am using Webform 7.x-4.0-beta3 (also just tried version rc3)

It looks like the denied access is coming from the webform.module function for webform_confirmation_page_access($node);

/**
 * Access function for confirmation pages.
 *
 * @param $node
 *   The webform node object.
 *
 * @return
 *  Boolean whether the user has access to the confirmation page.
 */
function webform_confirmation_page_access($node) {
  global $user;

  // Make sure SID is a positive integer.
  $sid = (!empty($_GET['sid']) && (int) $_GET['sid'] > 0) ? (int) $_GET['sid'] : NULL;

  if ($sid) {
    module_load_include('inc', 'webform', 'includes/webform.submissions');
    $submission = webform_get_submission($node->nid, $sid);
  }
  else {
    $submission = NULL;
  }

  if ($submission) {
    // Logged-in users.
    if ($user->uid) {
      // User's own submission.
      if ($submission->uid === $user->uid && node_access('view', $node)) {
        return TRUE;
      }
      // User has results access to this submission.
      elseif (webform_submission_access($node, $submission)) {
        return TRUE;
      }
    }
    // Anonymous user for their own submission. Hash of submission data must
    // match the hash in the query string.
    elseif ((int) $user->uid === 0 && (int) $submission->uid === 0) {
      $hash_query = !empty($_GET['token']) ? $_GET['token'] : NULL;
      $hash = md5($submission->submitted . $submission->sid . drupal_get_private_key());
      if ($hash_query === $hash) {
        return TRUE;
      }
    }
  }

  return FALSE;
}

The issue here is that the variable $submission is empty since the submission has been deleted, which ends up returning FALSE for the access.

Not sure the best way to address this, seems like there should be something in place that will allow the page to show the confirmation message even if the submission has been deleted.

Please see this page for a patch that attempts to address this issue:

https://drupal.org/node/2275943

Yes, it did. Thanks Robert!!