Display error after upgading 2.16.1

Hi all,
I upgraded my Piwik from 2.13 to 2.16.1, and I have a display error, on the corner, in the high/left

Any idea ?

It’s embarrassing, because administration menu, and plugins menu are hidden :disappointed_relieved:

Got it !
I deactivated plugin ZenMode, ant it works !
I deactivated all plugin one by one, in alphabetical order, and of course ZenMode with a Z was the last one !!!
Life is hard, sometimes :frowning: