restart pc, close everything all battle nets, all clients and start over, try running 2nd, log into character screen, close handle, try to run 1st.
You basically have just one battle net installation, but what happens when you use the launcher - it will start battle net and it will update the path to that particular game copy, (+handle is gone, process path is different) and that will allow you to run it twice.
This post was edited by Chobot on May 21 2022 07:40pm