A user doesn't receive reminders
Check that outgoing mail is enabled on your instance (.../secure/admin/OutgoingMailServers.jspa)
- Check if the user has access to the Jira instance (users with no access will not receive reminders)
The deleted reminder stays in an issue
Problem: a user deletes their reminder within an issue, after reloading the page the reminder is still there.
Check: as a Jira Admin navigate to Jira Settings → System → Global Permissions and ensure that the group atlassian-addons-admin has the permission to Browse users and groups:
Cause: the Reminder app checks user permissions to manage reminders by checking user groups. So the app itself requires the permissions to browse users and groups. The atlassian-addons-admin is a technical group for the apps. This permission is essential for the plugin to work properly