No web file viewer on ex4100 user account

After one of the two last firmware updates (I didn’t really know when it happened) there is no Web File Viewer when logging in with an user account on the web interface using

I can login but on the dashboard I can only see Main Page, Downloads, the free disk space and that there are 9 Apps available. That’s it.

There must be 2 more buttons on the top showing Web File Viewer and Apps.
I cannot find any settings where to enable or disable it.

Firmware: 2.31.204