gistfile1.txt

mono.android.DesignerException: com/android/util/PropertiesMap
	at mono.android.DesignerSession.checkRenderResultForError(DesignerSession.java:170)
	at mono.android.DesignerSession.load(DesignerSession.java:220)
	at mono.android.DesignerSession.processMessage(DesignerSession.java:735)
	at mono.android.MessageListener.executeMessage(MessageListener.java:88)
	at mono.android.MessageListener$Runner.run(MessageListener.java:45)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoClassDefFoundError: com/android/util/PropertiesMap
	at com.android.layoutlib.bridge.android.BridgeContext.createStyleBasedTypedArray(BridgeContext.java:940)
	at com.android.layoutlib.bridge.android.BridgeContext.obtainStyledAttributes(BridgeContext.java:638)
	at android.content.res.Resources_Theme_Delegate.obtainStyledAttributes(Resources_Theme_Delegate.java:71)
	at android.content.res.Resources$Theme.obtainStyledAttributes(Resources.java:1436)
	at android.widget.TextView.<init>(TextView.java:761)
	at android.widget.TextView.<init>(TextView.java:704)
	at android.widget.TextView.<init>(TextView.java:700)
	at com.android.layoutlib.bridge.MockView.<init>(MockView.java:50)
	at com.android.layoutlib.bridge.MockView.<init>(MockView.java:45)
	at com.android.layoutlib.bridge.MockView.<init>(MockView.java:41)
	at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:163)
	at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
	at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:858)
	at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:834)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
	at com.android.layoutlib.bridge.bars.CustomBar.<init>(CustomBar.java:95)
	at com.android.layoutlib.bridge.bars.StatusBar.<init>(StatusBar.java:67)
	at com.android.layoutlib.bridge.impl.Layout.createStatusBar(Layout.java:222)
	at com.android.layoutlib.bridge.impl.Layout.<init>(Layout.java:144)
	at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:297)
	at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:429)
	at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
	at mono.android.DesignerSession.load(DesignerSession.java:205)
	... 4 more

I have same problem, How can I do? It's AS bug?

Look at my screenshoot https://goo.gl/photos/tTY1rf7P6UK7mERn6

click the icon and change the rendering preview back to Android API 23