I did the steps you said but another error came up: "Only one instance of this application can run". This is getting ridiculous. im trying to be patient but im getting really close to just scrapping the game and asking for a refund on my subscription. Ive barely used 5 days on it and now my days are just ticking away and i cant play. If i cant get a fix tonight, I want to know who to contact for a refund. Ive lost 3 valuable days that i paid for when I should've been enjoying the game on those days.
Create a new windows user account and the game will likely install correctly. Something in your current profile is causing an issue. This will confirm it one way or the other.