Title: [Collab] NaN years ago displays at the bottom of the collab window after starting a new project

Steps to Reproduce:
1. Open Unity 5.5f3
2. Create a new project with analytics turned on and a organization selected
3. Once loaded into the new project, select the Collab Button at the top right of Unity
4. Select the Start Button
5. Observe, once the window flashes and reloads, it displays "NaN years ago" in the collab window

Note: Screenshot attached.