织梦自定义图片字段报错Call to a member function GetInnerText()

Fatal error: Call to a member function GetInnerText() on string in /include/taglib/channel/img.lib.php on line 51

Fatal error: Call to a member function GetInnerText() on a non-object in /include/customfields.func.php on line 539

$fvalue = trim($ntag->GetInnerText());

$fvalue = ($ntag=="") ? trim($ntag) : trim($ntag->GetInnerText());

$innerTmp = $arcTag->GetInnerText();

$innerTmp = ($arcTag=="") ? trim($arcTag) : trim($arcTag->GetInnerText());