The widgets created by WHMCS Bridge are only for use with the "portal" WHMCS template. If you have opted to use a different template (Pro only) then these widgets will not display.

Each of the widgets are descriptively named and display menu content and logged in user information. The widgets that display logged in user information/menus will only show content if the user is logged in.

It is suggested you make use of a WordPress template that has a left or right sidebar as some of the widgets are meant for sidebar display as apposed to horizontal full width display.