raasun / treasurehunt Goto Github PK

Hello, I am trying to use your project but I have a problem.
I have both cardboard-master both treasurehunt-master.
First of all I import in my workspace cardboard-master and appears an alert with red stop and text: "Errors occurred during the build.
Errors running builder 'Android Pre Compiler' on project 'MainActivity'.
Could not initialize class com.android.xml.AndroidXPathFactory".
I click on OK and I have not errors on cardboard-master.
Then I import treasurehunt-master and refresh Library in Project Properties -> Android -> Add -> cardboard-master.
Now I have a big red ! near MainActivity folder and I can see in Project Properties -> Java Build Path -> Libraries a red X on Android Dependencies at cardboard-master.jar ... cardboard-master/bin (missing).

I think there is a mistake with the library. Can you help me?
Thank you in advance!