Developer & Settings Sections Missing in Umbraco v4.7.2

I inherited a site running Umbraco v4.7.2 and when logged into the backoffice, I don't see the icons for the settings & developer sections.  Does anyone have any idea why this would happen? 


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/54588-developer-settings-sections-missing-in-umbraco-v472