Custom field return blank

Hi,
I created meta box (field name is 'xSpace_event_date') using custom table and confirmed that it's saved in the custom table (xSpace_event_setting) and also showing up on wordpress admin.

But I can't show the value using this code:

$date = rwmb_meta( 'xSpace_event_date', ['storage_type' => 'custom_table', 'table' => 'xSpace_event_setting'] );
echo $date;

Any clue or any step that I missed?

Thanks