Are you using the same avatar in VSeeFace? Is this an avatar you've made yourself or is it pre-made?
It's the same avatar in both, and it's one I made myself. I tested v1.0 and the same thing is happening. I do get this error when starting up or loading a new model: "Object reference not set to an instance of an object". I would sometimes get the same error in 0.82, but it would still work normally otherwise even when that error popped up.