This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The missing file is a Maven user settings file (as in the error message) and this file is not required, as far as I know.
Is the error fatal, i.e. preventing you from completing your task?