Customize Touch Bar... not working

I can't access 'customize touch bar' from finder or any other app. For some reason, it is greyed out and doesn't highlight. What can I do?

--- Post Merged, Nov 26, 2016 ---

I think there's something wrong with my touch bar? Even when I open Calendar, the touch bar doesn't change and show those months on the touch bar. It is responsive, but it stays the same no matter which app I open and I cannot customize it. How do I fix this..?