user not receiving PDF.
1 either scheduled tasks wasn't triggered properly
2 or email sending is not working
to work out if the reasons is 2), we can easily add a "Send report now" test button in the form.
maybe a test button in general settings after "Use SMTP server for e-mail" is a better choice ,
Should the installer send a test email? Being able to send email is a requirement for resetting forgotten passwords.
(In ) Fixes #1538