Users have lost access to navigation

Users have lost access to navigation

At least two of the users of my application have lost access to the left navigation panel. They can log in successfully and get into the default start page, but they have no navigation options to switch to different views. I provided a direct link to some of the views and that seemed to work correctly. They have permissions for all forms and views in sharing, and they can get elsewhere with a direct link.

Both of these users have been able to successful use the application for several months, and no changes or updates were made on my end.

Everything looks fine to me as the owner, but I don't believe anyone I've shared to can access anything other than the default page.

Was there an update done on your end on the last week that changed something? When do you expect to have this working correctly again?