When I try to invoke the Emoji and Keyboard Viewer via the Keyboard shortcut (CRTL + CMD + SPACEBAR), the menu bar icon crashes on me and the viewer does not invoke.
I tried removing the preference file
com.apple.HIToolbox.plist as suggested in this Apple Forum answer. After restarting the keyboard viewer icon appears in my menu bar (American Flag). I can select items in the menu. As soon as I invoke the keyboard shortcut however it disappears:
Do I have a corrupt preferences file somewhere?
I am running macOS Sierra V 10.12.3.