Some settings are set by default. There are Three Instagram Widgets integrated to this module, anyone of them can be chosen. Each Widget settings are in other Tabs.
For Example: You chose "SnapWidget" as a Source. Then you have to configure this to "SnapWidget Settings" in the Other tabs.
In the case of all Widgets you will need Widget Key Without that you cannot configure the module. See Next-Chatper to see how to get Widget Keys for all Widgets.