Version 4.5.0

admin/upgrade/html/forms/template.phtml

@@ -2,7 +2,7 @@
 <form action="{$action}" method="post" {{if $uploadField}}enctype="multipart/form-data"{{endif}}>
 	<input type="hidden" name="{$id}_submitted" value="1">
 	{{foreach $hiddenValues as $k => $v}}
-		{{if is_array( $v )}}
+		{{if \is_array( $v )}}
 			{{foreach $v as $_k => $_v}}
 				<input type="hidden" name="{$k}[{$_k}]" value="{$_v}">
 			{{endforeach}}