Okay, and by first post you mean from this thread? sorry wanted to make sure
Maybe. The "continuity camera" feature's for using an iphone as a webcam, but PNGTuber+ doesn't need a camera, only a mic.
I found a bug report for Godot (the language PNGTuber+ is written in) when googling the first error message. It looks like it hasn't been resolved yet. Unfortunately this app might just not work for you (at least with your current version of macOS).