on line 59, parent
is expected to be an integer, you’re passing an object:
$args = array(
'orderby' => 'slug',
'order' => 'ASC',
'parent' => $category // <---- here
);
it should be $category->term_id
on line 59, parent
is expected to be an integer, you’re passing an object:
$args = array(
'orderby' => 'slug',
'order' => 'ASC',
'parent' => $category // <---- here
);
it should be $category->term_id