Granular Synth Setup

I’m trying to setup the granular synth in the new audio engine. I followed all the steps given by Dan in the “4.17 New Audio Engine: Early Access Quick-Start Guide”, but when I add the granular synth component, the details panel is not showing any Synth > Preset submenu where I can add a .wav (see attached pic). Is this a problem anyone else has seen? And what is the reason for this?