Why are patrons not receiving their overdue emails?

Overdue item email notifications are not being sent when a patron's item becomes overdue

You may still need to assign an overdue sequence to your loan terms:

Find a user who should be receiving the emails. Under User Details, make a note of the User Category.
Find the copy of the item that was on loan. Under Copy Details, make a note of the Copy Category.
These details will help you find the appropriate Loan Term. In the left-hand menu, go to Circulation Reference Data > Loan Terms.
Search for loan terms by either the User Category or the Copy Category.
Select the loan term that applies to the combination of user and copy category.
At the bottom of the screen, you may see that the Overdue Sequence field is blank. If this is the case, click Modify Record and use the drop-down menu to select an appropriate overdue sequence.
Click Save and Close.
These changes will take effect for any new items that become overdue after modifying this record.

11232