Chartboost - app crashes on Kindle Fire

We are encountering a certain crash on Kindle Fire devices. 

The stack trace is:

java.lang.NullPointerException

    at com.chartboost.sdk.impl.bi$1.run(SourceFile:251)

    at android.os.Handler.handleCallback(Handler.java:755)

    at android.os.Handler.dispatchMessage(Handler.java:95)

    at android.os.Looper.loop(Looper.java:145)

    at android.app.ActivityThread.main(ActivityThread.java:5266)

    at java.lang.reflect.Method.invokeNative(Native Method)

    at java.lang.reflect.Method.invoke(Method.java:515)

    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:826)

    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:642)

    at dalvik.system.NativeStart.main(Native Method)

This happened to users Android version 4.4.3 and devices Amazon KFTHWI and Amazon KFSOWI.

I’ll report this to Chartboost.

I’ll report this to Chartboost.