Eigenfrequency study with FSI interface in 4.3a

I attempted to use the FSI interface with the eigenfrequency study step using its default configuration under 'custom studies' in the model wizard. The study step indicates a warning, however, so I suspect the eigenfrequency solver settings are not compatible with the physics settings. I included a simple model to illustrate the fault. All eigenfrequency solutions appears at 'NaN.'

Has anyone had any luck with this interface using an eigenfrequency study?