As listed in the separate article Supported Nikon Cameras, the D3x00 series are not supported by Nikon.
Nikon does not offer the library (also known as SDK) needed by developers like us in order to add support in Sofortbild. We don’t know why that is the case, there’s no official information from Nikon regarding the topic. Feel free to check the Nikon site for yourself to see which cameras can be supported in theory.
Posted in: Cameras