Sorry for being so imprecise 🙂
I have meeting assigned, all of them had been done before upgrade and the perspective is right. I can change the perspective but it doesn't make any difference. I can't add a meeting neither from calendar view nor for company view. In the company view there is a button to add an event but after pressing it nothing appears. Also I have checked if it works with different browsers - same issue for Chrome, IE, Firefox.
