Installed the game and started the tutorial. After trying the first tutorial, which I of course failed, I quit the game to come back to it later. I got the below message.
I uninstalled and reinstalled the game and again, it initially worked but then gave me the same message. Not sure what the cause is. It installed in my "C:\Users\USERNAME\AppData\Local\Ultimate Admiral Dreadnoughts"
I don't know if this is an installation issue and installing it to a custom directory will help or not.