February 21, 2021
Hi! thank you for using the add-on.
If you are able to create the tracker, then there are no duplicate dates. If you are able to announce to class for one of your attendance trackers there are most likely one of two causes:
1. The account running the tracker must be listed as a teacher on the class (I don't think this is the case)
2. you are trying to announce to class on a date that has already passed or is current. (could be this one)
Announce to class button will schedule an announcement at 8 am in your time zone for the date listed. If you are trying to announce the day of, after 8am, or a date in the past it will not work. if you find dates like these, you will just have to go to the date in question on the link sheet and scroll to the column that says "scheduled announcement in google classroom" That should be blank for the date that is causing the error, then type in that cell something like Skip or bypass. This will then not use this date and move everything forward for the next days.
Please keep me updated on your progress, I would like to ensure that we are able to address the issue that you are having. If this does not work, you can share the sheet with me to address the issue.