Niagara Skeletal Mesh Error

Hey all! Kinda just starting out in Niagara and I’ve run into an issue with the Skeletal Mesh parameter that I can’t seem to find a fix for. In some videos, I’ve seen this error (attached image) and once they select the mannequin it disappears… No luck for me, unfortunately, is this a bug in 4.24 or am I doing something wrong?