My designer doesn't show any changes or content. it says it has a render problem:
java.lang.NoClassDefFoundError: sun/misc/Cleaner at libcore.util.NativeAllocationRegistry_Delegate.registerNativeAllocation(NativeAllocationRegistry_Delegate.java:81) at libcore.util.NativeAllocationRegistry.registerNativeAllocation(NativeAllocationRegistry.java:231) at android.graphics.RenderNode.(RenderNode.java:228) at android.graphics.RenderNode.create(RenderNode.java:243) at android.view.View.(View.java:5063) at android.view.View.(View.java:5201) at android.view.ViewGroup.(ViewGroup.java:675) at android.view.ViewGroup.(ViewGroup.java:671) at android.view.ViewGroup.(ViewGroup.java:667) at android.view.ViewGroup.(ViewGroup.java:663) at android.widget.FrameLayout.(FrameLayout.java:85) at com.android.layoutlib.bridge.impl.Layout.(Layout.java:140)
i've tried everything, installing again, updating everything, setting to older versions, changing rendering version, etc. Everything i could find on the internet doesn't seem to work.
please help