Can't get Complex field value

[oooh-boi]

CF: v3.1.2
WP: 5.3.2
PHP: 7.2.14

Been using CF since version 2 but I'm not sure whether I'm so old or there's really something wrong.

I have a complex field with a group of two text fields and 2 date fields inside. Nothing too fancy or unusual. That complex field is a part of the tab container.

Field::make( 'complex', 'bm_seasonal_prices', esc_attr__( 'Create exception in accommodation price', 'bookmate' ) )
->set_duplicate_groups_allowed( true )
->add_fields( array(

	Field::make( 'text', 'bm_exception_title', esc_attr__( 'Exception title', 'bookmate' ) )
	->set_width( 100 ),

	Field::make( 'date', 'bm_exception_date_start', esc_attr__( 'Exception date start', 'bookmate' ) )
	->set_storage_format( Bookmate::bookmate_date_format() )
	->set_width( 33 ),
	
	Field::make( 'date', 'bm_exception_date_end', esc_attr__( 'Exception date end', 'bookmate' ) )
	->set_storage_format( Bookmate::bookmate_date_format() )
	->set_width( 33 ),
	
	Field::make( 'text', 'bm_exception_date_range_price', esc_attr__( 'Exceptional price', 'bookmate' ) )
	->set_width( 33 )
	->help_text( esc_attr__( 'Price must be in format: 1234.56 (dot notation).', 'bookmate' ) ),
	
) )
->set_header_template( '
	<% if (bm_exception_title) { %>
		<%- bm_exception_title %>
	<% } %>
' )

By trying to get the value of my complex field, I get an empty array...

$seasons_arr = carbon_get_post_meta( $pid, 'bm_seasonal_prices', 'complex' );

Here's the Post Meta Inspector result screenshot too. I know that WordPress pipe-separates multiple meta values but not sure whether they get properly parsed by CF.

I desperately need help. PLEASE!

[JuanBernal98]

Is not working like that?

$seasons_arr = carbon_get_post_meta( $pid, 'bm_seasonal_prices');