New IOS App, No Notifications

our developer released a new version of the IOS application and it is not receiving notifications. I will admit to be very inexperienced with Mattermost. Server looks ok, mattermost-push-proxy looks ok, but i see IOS failed notificaitons in the log all over the place. But i can’t see WHY its failing. Open to a lot of ideas!

Maybe Mobile push notifications - Mattermost documentation will help?