we've just released the first beta for Sketch 48: http://sketchapp.com/beta/
Along with multiple improvements (specially in the colour front) and many bug fixes, we've managed to completely break
We're working to get that fixed in beta 2, so please bear with us while we unbreak it.
Meanwhile, take the time to test your plugins in Sketch 48, and let us know about any issues you may find!
Thanks in advance for your time