Kami is not opening correctly

We currently have the kami app installed district wide with both Kami apps as suggested. We also have 3rd party allowed in our Google admin console.

However students are not still able to edit docs in kami and save them to their drive. The steps they have to take are open google class>download file to PC >open with Kami>import into kami> and then save to google class.

The error they are receiving is (The Domain policy has disabled thrid-party Drive apps.)