The error is caused by the missing App "AD9361 filter design wizard". The App should be automatically installed with the first installation of the SimRF models, but sometimes things do not quite work out as expected. I recommend to uninstall "AD9361 filter design wizard" and to manually remove all folders related to it in the App installation folder. After that, please re-install the App - using the installation procedure of the SimRF models or by directly installing the App that is also independently available on MATLAB Central. Last, make sure that you have access to this folder when running the SimRF models.