If the Maven version is less than version 3.2.5, you will have to update the Maven version to be at least version 3.2.5. Navigate to the GameLiftAgent package root (directory including pom.xml file) ...

For Windows users, or for anyone having any problems with ... In order to use pip, first make sure you are using the correct version. One way to do this is check which pip you are running: $ which pip ...