Strange thing happened. I am using the Nintex 2016 Version: 188.8.131.52 to create a custom form and all sudden the Ribbon remains grayed out although they are still clickable. It is annoying .
when I reset the form to default, the ribbon gets back to normal (in full colour).
what is going on here ... I have not used any custom .css apart from the Rules and played around with the layout.
When inspecting the browser, there seems to be a css file ms-cui-disabled
As soon as I remove it within the inspector, the Ribbon comes back to normal.
Anyway ideas what is causing it ?!