Hi and welcome, @support_request. When you have a chance, we encourage you to introduce yourself and your project to help build community and add context around your needs.
This is highly unexpected and suggests that there's something unusual about your installation. Did you exactly follow the installation instructions? Are you using the local database or a separate database service?
Have you had a chance to read this troubleshooting section about email: https://docs.getodk.org/central-troubleshooting/#users-aren-t-receiving-emails?