A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
I installed as suggested the previous version it worked (2.0.4) until I misclicked to "update to newest version" popup and now I have same error...
After hours of search this finally works. Hope developers alert us more user friendly and descriptive messages. It is a really bad programmer...