euthelup on "PixTypes does not work for multisite wordpress"

I have a multisite wordpress. I installed and activated pixtypes. In the theme, I set up the metaboxes as below. The metaboxes successfully appears on my main site in the multisite., but none of the sub sites shows the metabox.

$pixtypes_conf_settings = array( 'first_activation' => true, 'metaboxes' => array( '_job_listing_the_aside' => array( 'id' => 'job_listing_aside', 'title' => esc_html__( 'Gallery Images', 'mvp' ), 'pages' => array( 'job_listing' ), // Post type 'context' => 'side', 'priority' => 'low', 'show_names' => true, // Show field names on the left 'fields' => array( array( 'name' => esc_html__( 'Gallery Image', 'mvp' ), 'id' => 'main_image', 'type' => 'gallery', ), ) ),

https://wordpress.org/plugins/pixtypes/