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.
Ohhh, this is a simple mistake made by many human beings such as yourself. All you need to do is change all the "."s to ","s and it will all be...
I'm having this same problem, if you figure out what the solution is please message me sir! :)