Debug: Form did not capture entries

Just to be extra certain, have you checked spam filters? Also worth checking to confirm whether or not the disable email functionality isn’t toggled on, as that’d prevent the admin emails from going through.

Admittedly we don’t have “Entries” like you may be familiar with, with plugins like GravityForms or similar, where they are also stored in the database. Unless things were just getting caught in spam, I’m afraid those submissions may be lost.