I am using Sketch v 51.3 running on a Macbook Pro (15-inch, OS Sierra). I downloaded the Craft plugin and installed but when I go to sync and I need to Sign In to my InVision account or even look at Preferences, the Craft screen goes blank. And unless there's an 'x' on the screen at top, I can't even go back to the main screen.
What do I do? What could the issue be?
I've tried uninstalling and re-installing (including deleting all Application Support files/folders).