Classroom does not appear in System Preferences
TLDR: I am running macOS Mojave 10.14.4 and Classroom does not appear in System Preferences on student Macs so they cannot join my class.
Details:
I have just updated the student Mac to 10.14.4 and this article (https://support.apple.com/en-gb/guide/classroom/mac-settings-for-students-apdd330bbd46/2.0/mac/10.14) says that with this OS version I should have 'Classroom' as an option on Student Macs. On my Mac I have the Classroom app open and have created a class and have a class code. We are connected to the same network and are in close proximity. Bluetooth is enabled on both teacher and student Macs (not sure if that's relevant or not but I assume this is how it checks the devices are close to each other).
Students login with a shared local login we don't use active directory. Could this be the problem?
I'm at a loss for what else to check/try.
Mac mini 2018 or later