Turn in button missing


I added a Kami assignment through Google Classroom for my students but the turn in button is not appearing. All chrome books have the extension installed. I chose the option to make a copy for each student. I even tried a demo account on my mac book and it is still not showing up. It also makes the students authorize google drive every day. It does not save day after day. Is this normal??

How do I fix this. I have read the online help pages and it seems like we have things set up correctly.

Thanks so much!!