With this version I have experienced the same problem, the only solution I could find was having the email option enabled and then have the emails forwarded to prowl and it works fine. hope it helps.
[16:08:24.752 N] [Trinity] Error sending email.
System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at
at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode...
Im having this exact same problem I input the API code into the iphone box and click enable but never do i get notifications on the phone and i have watch a bot get legendaries and not send them to the app.