Help

Hello. I have a Google Classroom class with 37 students. When I use “Share to Google Classroom” in LiveWorksheets, the class appears as having only 30 students. The other 7 students are completely missing from the list and cannot be found using the student search. All 37 students are active members of my Google Classroom. I have reloaded LiveWorksheets and reconnected Google Classroom, but the problem remains. Could you please check the synchronization of my class roster?