IAP My first crash

I just got my first ever crash report  Here is the stack trace

java.lang.IllegalStateException: Lua state is closed
    at com.naef.jnlua.LuaState.check(Unknown Source)
    at com.naef.jnlua.LuaState.rawGet(Unknown Source)
    at plugin.google.iap.v3.LuaLoader$1.onIabSetupFinished(LuaLoader.java:148)
    at plugin.google.iap.v3.util.IabHelper$1.onServiceConnected(IabHelper.java:262)
    at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1127)
    at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1144)
    at android.os.Handler.handleCallback(Handler.java:615)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:153)
    at android.app.ActivityThread.main(ActivityThread.java:5086)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
    at dalvik.system.NativeStart.main(Native Method)

I wouldn’t know how to begin debugging this problem.  Any suggestions appreciated?

thanks