Email notifications (new user + account needs review) not going through

Hello,

I am the web manager of this site. It seems to be already the second time when this issue occured, when the admin of the site isn’t getting notifications when a new user registers on the site AND when an account needs verification. This functionality is crucial since it is connected with paid online courses hence it is important that the admin/owner of the business is notified properly when a new user registers and needs verification.

Thank you so much for looking into this and helping.

The page I need help with: [log in to see the link]