Here is the stack trace:

Fatal Exception: java.lang.RuntimeException

Unable to start activity ComponentInfo{com.hubhopper/zendesk.messaging.MessagingActivity}: android.view.InflateException: Binary XML file line #2 in com.hubhopper:layout/zui_activity_messaging: Binary XML file line #2 in com.hubhopper:layout/zui_activity_messaging: Error inflating class zendesk.messaging.ui.MessagingView

Caused by android.view.InflateException

Binary XML file line #2 in com.hubhopper:layout/zui_activity_messaging: Binary XML file line #2 in com.hubhopper:layout/zui_activity_messaging: Error inflating class zendesk.messaging.ui.MessagingView

Caused by android.view.InflateException

Binary XML file line #2 in com.hubhopper:layout/zui_activity_messaging: Error inflating class zendesk.messaging.ui.MessagingView

Caused by java.lang.reflect.InvocationTargetException

Caused by android.view.InflateException

Binary XML file line #13 in com.hubhopper:layout/zui_view_messaging: Failed to resolve attribute at index 4: TypedValue{t=0x2/d=0x7f04000f a=-1}

Caused by java.lang.UnsupportedOperationException

Failed to resolve attribute at index 4: TypedValue{t=0x2/d=0x7f04000f a=-1}