我收到此错误
htmlspecialchars() expects parameter 1 to be string, object given in /homepages/25/d695898710/htdocs/clickandbuilds/Joomla/prestigetaxisheathrow/components/com_sppagebuilder/parser/addon-parser.php on line 561
第561行在哪里
$default .= ' '.$key.'="'.htmlspecialchars($val).'"';
我该如何解决此错误?