WP version: 4.9.4, WP Email Users version: 1.4.15. I’m working on my university server (doing a page for learning purposes).
Updated, now on version 1.4.15. Unfortunatelly, still the same.
Actually I checked all the catalogues. Could it be a problem with server or something else?
Add: in the “Sent Emails” list I could see that email, but not in gmail mailbox.