Additional team and channel-related features and issues within Microsoft Teams for Education
Hi KwokKitling,
Noticed that you post your concern in OneNote / iPhone & iPad / Office Mobile apps category before, I helped you move your thread to this Teams category so that you can get better advice.
For creating OneNote Class Notebook in Teams, I suggest you first try to create it in Teams Online or Teams desktop then check it on your mobile devices. You can refer to this article for a detailed instruction on creating it: Use OneNote Class Notebook in Teams. At the same time, if you need more help about using Class Notebook in OneNote, please visit this site: http://onenoteineducation.com/
If you still encounter problems when you try to create class notebook in Teams, please share me some screenshots about your failed error page so that I make a further analysis.
Thanks for your patience and kind understanding.
Regards,
Shawn