Unfortunately, we discovered that our email delivery service was not working again. The cause of this was that the mail service we subscribe to recently underwent a migration to a new version and our updates completed in March was not completely reliable. The problem was not obvious until the migration had been completed and the old version was officially turned off.
In any case, the issue has been resolved and you should receive site-delivered messages now. I'm hoping that this is the final fix that will be required, but if you continue to have issues, feel free to jump into our DIscord and leave a note. Thanks for your patience.