2. Yes Early access code includes pre order bonus items.

As for the 1, there's a number of problems that could happen. If, when retrying, the problem isn't resolved it's more than likely something on your end. Not bashing on your setup or anything but working with the firewall, executing as an admin, or configuring windows defender could all contribute to problems like that. It's also possible that uninstalling and reinstalling could solve your problem...this is all speculation of course