Can't connect to account

I just installed Avast Anti-Theft. I’m trying to sign into my Avast Account for the first time on my Android device but I keep getting the message; “The service is temporarily unavailable, please try again later”. I’m using a Samsung Galaxy S4 mini, with Kit Kat 4.4.2

Update : I figured out what the problem was. I have NoRoot firewall installed and it was blocking Avast from signing me in. I disabled it and it let me sign in.