some Problems in audio module

Problems I faced some Problems when I install audio module

when i add audio node I got this message

warning: Invalid argument supplied for foreach() in /home/xxxx/public_html/sites/all/modules/audio/audio.module on line 558.

function make the problem

function _audio_save(&$node) {
  // Save the file
  $node->audio['file']->timestamp = time();
  $node->audio['file']->filesize = filesize($node->audio['file']->filepath);
  $node->audio['file']->status |= FILE_STATUS_PERMANENT;
  // If there's an fid update, otherwise insert.
  $file_update = empty($node->audio['file']->fid) ? array() : array('fid');
  drupal_write_record('files', $node->audio['file'], empty($node->audio['file']->fid) ? array() : array('fid'));

  // Save the audio row.
  $audio = array_merge($node->audio, array('nid' => $node->nid, 'vid' => $node->vid, 'title_format' => $node->title_format, 'fid' => $node->audio['file']->fid));
  $audio_update = ($node->is_new || $node->revision) ? array() : array('vid');
  drupal_write_record('audio', $audio, $audio_update);

  // Remove any existing metadata.
  db_query("DELETE FROM {audio_metadata} WHERE vid=%d", $node->vid);

  // Save the new tags.
  $allowed_tags = audio_get_tags_allowed();
  foreach ($node->audio_tags as $tag => $value) {
    if (in_array($tag, $allowed_tags) && $value) {
      $metadata = array('vid' => $node->vid, 'tag' => $tag, 'value' => $value, 'clean' => audio_clean_tag($value));
      drupal_write_record('audio_metadata', $metadata);
    }
  }
}

also when I view the audio node I got this message :

# warning: Illegal offset type in isset or empty in /home/xxxx/public_html/includes/bootstrap.inc on line 873.
# warning: Illegal offset type in /home/xxxx/public_html/includes/bootstrap.inc on line 874.
# warning: Illegal offset type in /home/xxxx/public_html/includes/bootstrap.inc on line 878