Hi there,
this is likely a support form request, however I've been getting an error for the last three weeks when trying to submit one (maybe you could help with that too...).
We've recently added a new user and they are not receiving their invitation via email. We have resent the email several times and also removed and added the user again. He did receive an email from Tempo when his hours were approved (obviously logged by someone else), so the email is definitely correct and Tempo had no issues with the connection.
I've seen someone had that problem before here where it got fixed, might be a similar issue?
Solved: User not receiving invitation email (atlassian.com)