I posted to the General Plugins Forum, but thought maybe anyone that has upgraded to Moodle 3.0 might have also experienced this issue...
We have installed Moodle v3.0 with the Event Reminders v1.4.2 (2015090500) on a new Windows Server 2012R2. Reminders worked perfect on 2.8.1.
In our new Moodle, Reminders are being sent for "Events" such as Site, Course, Group, User, events that are on the calendar. Assignments that are on the calendar are also coming through with reminders.
There are no reminders being send for Quizzes. The Quizzes are not hidden. The Plugins page is configured to send the notifications 1, 3 and 7 days before due.
Cron is set up in Windows Task Manager and I know it is scheduled to run properly because I am receiving notifications of Forum posts every time Cron runs.
Here is the outcome from running Cron:
Starting local plugins
Processing cron function for local_reminders...
... started 10:48:31. Current memory use 6.4MB.
[Local Reminder] Time window: Tuesday, 12 January 2016, 10:29 AM to Tuesday, 12 January 2016, 10:48 AM
[Local Reminder] Found 7 upcoming events. Continuing...
[Local Reminder] Processing event#994 [Type: due, inaheadof=1 days]...
[Local Reminder] Finding out users for event#994...
[Local Reminders] host [ moodle.wvcsd.org ]
[Local Reminder] Starting sending reminders for 994 [type: due]
[Local Reminder] All reminders was sent successfully for event#994 !
[Local Reminder] Processing event#998 [Type: course, inaheadof=1 days]...
[Local Reminder] Finding out users for event#998...
[Local Reminders] host [ moodle.wvcsd.org ]
[Local Reminder] Starting sending reminders for 998 [type: course]
[Local Reminder] All reminders was sent successfully for event#998 !
[Local Reminder] Processing event#999 [Type: group, inaheadof=1 days]...
[Local Reminder] Finding out users for event#999...
[Local Reminder - ERROR] Error occured when initializing for event#[999] (type: group) Coding error detected, it must be fixed by a programmer: Invalid modulename parameter
[Local Reminder] Processing event#1000 [Type: course, inaheadof=1 days]...
[Local Reminder] Finding out users for event#1000...
[Local Reminders] host [ moodle.wvcsd.org ]
[Local Reminder] Starting sending reminders for 1000 [type: course]
[Local Reminder] All reminders was sent successfully for event#1000 !
[Local Reminder] Processing event#1001 [Type: site, inaheadof=1 days]...
[Local Reminder] Finding out users for event#1001...
[Local Reminders] host [ moodle.wvcsd.org ]
[Local Reminder] Starting sending reminders for 1001 [type: site]
[Local Reminder] All reminders was sent successfully for event#1001 !
[Local Reminder] Processing event#1002 [Type: due, inaheadof=1 days]...
[Local Reminder] Finding out users for event#1002...
[Local Reminders] host [ moodle.wvcsd.org ]
[Local Reminder] Starting sending reminders for 1002 [type: due]
[Local Reminder] All reminders was sent successfully for event#1002 !
[Local Reminder] Processing event#1005 [Type: due, inaheadof=1 days]...
[Local Reminder] Finding out users for event#1005...
[Local Reminders] host [ moodle.wvcsd.org ]
[Local Reminder] Starting sending reminders for 1005 [type: due]
[Local Reminder] All reminders was sent successfully for event#1005 !
done. (2206 dbqueries, 55.2 seconds)
Finished local plugins
Thank you to anyone that may have a suggestion!