You are waiting for an email from the app that never comes: a password reset, an email verification, an invitation, an alert or a scheduled report. Or the invitation email came, but its link shows "Link expired" or "Link not valid" and opens the sign-in screen.
First decide which kind of email it is. Emails about your user's security always go out, whatever your email settings:
Alerts and scheduled reports are notification emails. Your settings can stop them.
Check
Fix
For a reset, select Resend The Code on the confirmation code screen. The emailed link works for 10 minutes and once only, so use the newest email.
The app sends to the email address of your user. After you change the address, the app uses the new one only once you verify it.
Check
Fix
The verification link works for 14 days and once only. See Verify your email address and phone number.
If you cannot sign in at all, ask the Owner of your account which address your user has.
An invitation link works for 30 days. After that, opening it shows "Link expired" and the sign-in screen. A link that does not match a pending invitation shows "Link not valid". An invitation that someone already accepted or declined does not open the sign-up form again.
Check
Fix
The person who invited you applies the fix:
See Invite a user to your account.
If the invitation went to an email address that already has a user, the link opens the sign-in screen, not the sign-up form. If someone else is signed in on that browser, the app signs them out first.
Fix
You can also answer from Invitations in the user menu. See Accept or decline an invitation to another account.
The unsubscribe link at the bottom of an alert or report email stops all notification emails to that address, in every account. A recipient who unsubscribed gets no scheduled reports, and the schedule's last run shows "some recipients missed".
Check
Fix
See Stop or restart notification emails.
Each user chooses, per severity, which channels reach them. By default, only critical alerts come by email. A warning or info rule with Email on still sends you no email if you kept the default.
Check
Fix
See Silence alerts at night or mute a rule.
No email goes out if there was nothing to send: the alert did not fire, or the scheduled report failed or was paused.
Fix
Contact support@getgps.eu with:
Never forward a reset or invitation email to anyone; its link works like a key.