Hi Isuru,
Did you get the plugin working on moodle 2.8?
I have a clean install of moodle 2.7 with Event Reminder 1.4 and that works fine.
But on both a clean install of moodle 2.8 (and one that has progressively been upgraded from pre moodle 2.6) with Event Reminder 1.4.1 I can't get the reminders to be sent.
Let me see if I can gather any other info on this.
Cheers
Peter