Unknown fieldtype selectpage

Hi

I have this code, that works with 4.3.3, but not with the latest 4.3.10, and I can’t find out of why:

`if ( !class_exists( ‘RW_Meta_Box’ ) )
return;

$meta_box = array(
‘id’ => ‘relatedpage_mb’,
‘title’ => ‘Relateret udgivelse/bog/film’,
‘pages’ => array(‘topic’),
‘context’ => ‘side’,
‘priority’ => ‘high’,
‘fields’ => array(
array(
‘name’ => ‘Vælg’,
‘desc’ => ”,
‘id’ => ‘related_page_id’,
‘type’ => ‘selectpage’,
‘page_types’ => array(“publication”, “book”, “movie”)
)
)
);

new RW_Meta_Box($meta_box);`

It seems, that it’s the ‘type’ => ‘selectpage’, that makes it throw this error:

call_user_func() expects parameter 1 to be a valid callback, first array member is not a valid class name or object in plugins/meta-box/inc/meta-box.php on line 388

call_user_func() expects parameter 1 to be a valid callback, first array member is not a valid class name or object in plugins/meta-box/inc/meta-box.php on line 80

https://ww.wp.xz.cn/plugins/meta-box/