MagicPicker color wheel is blank in Photoshop. Ideas?

Hi! Suddenly MagicPicker plugin extension is launching as a blank panel in my Photoshop. It should look kinda like this (when I launch it from Window/Extensions):

But it looks like this:

It started yesterday, before that it was working with no problems. Do you have any ideas what could have changed? I tried updating, restarting, cleaning - nothing helps!