Team Projects Invite Won't Work

I live in Victoria so as a student, I am pretty sure that the Victorian Government provides Adobe Enterprise Access to all High School students in the state. My friend and I were both logged into Premiere Pro and tried sending an invitation to each other to work on a Team Project. Whenever we open the Team Project tab, it says 'Title, Description and then Collaborators'. I edit the collaborators' tab and type in his Adobe School Email, it works but after I click 'Close' to save it, it loads for a few minutes and then says 'Failed to send invitation to <username>'. I have searched through the forums and done the only apparent solution to this which is to delete one of the files but it makes no difference. I have also contacted my school's IT administrator but we are still getting back to each other. Is there any way to fix this via my client or do I have to ask the administrator? If it is possible, how do I fix this?