Hi Ahn - I'm testing the Mailpoet plugin, and am having a display issue when the a user is redirected back to the site to confirm a newsletter subscription.
Here's the link structure where this is happening:
The page is displaying a blank page with only the following:
// Metabox.io https://docs.metabox.io/displaying-fields/
The following is in my single.php theme file:
$value = rwmb_meta( $field_id );
What's causing this, do you think?