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.
We have millions of players, but only one player has reported this problem. We can't reproduce and have no idea about it. Unfortunately we don't...
According to the information of the window about error, it may be helpful to close the firewall of your OS. My friend solved the problem in this way.