The present error is:
java.lang.ClassNotFoundException: android.view.View $ OnUnhandledKeyEventListener at org.jetbrains.android.uipreview.ModuleClassLoader.load (ModuleClassLoader.java:180) at com.android.tools.idea.rendering.RenderClassLoader.findClass (RenderClassLoader.java:61) at org.jetbrains.android.uipreview.ModuleClassLoader.findClass (ModuleClassLoader.java:118) at java.lang.ClassLoader.loadClass (ClassLoader.java:424) at java.lang.ClassLoader.loadClass (ClassLoader.java:357) at org.jetbrains.android.uipreview.ModuleClassLoader.loadClass (ModuleClassLoader.java:213) at android.support.v7.widget.ActionBarContainer. (ActionBarContainer.java:62) at sun.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance (NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance (DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance (Constructor.java:423) at org.jetbrains.android.uipreview.ViewLoader.createNewInstance (ViewLoader.java:481) at org.jetbrains.android.uipreview.ViewLoader.loadClass (ViewLoader.java:264) at org.jetbrains.android.uipreview.ViewLoader.loadView (ViewLoader.java:222) at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView (LayoutlibCallbackImpl.java:209) at android.view.BridgeInflater.loadCustomView (BridgeInflater.java:337) at android.view.BridgeInflater.loadCustomView (BridgeInflater.java:348) at android.view.BridgeInflater.createViewFromTag (BridgeInflater.java:248) at android.view.LayoutInflater.createViewFromTag (LayoutInflater.java:730) at android.view.LayoutInflater.rInflate_Original (LayoutInflater.java:863) at android.view.LayoutInflater_Delegate.rInflate (LayoutInflater_Delegate.java:72) at android.view.LayoutInflater.rInflate (LayoutInflater.java:837) at android.view.LayoutInflater.rInflateChildren (LayoutInflater.java:824) at android.view.LayoutInflater.inflate (LayoutInflater.java:515) at android.view.LayoutInflater.inflate (LayoutInflater.java:423) at com.android.layoutlib.bridge.bars.BridgeActionBar. (BridgeActionBar.java:89) at com.android.layoutlib.bridge.bars.AppCompatActionBar. (AppCompatActionBar.java:68) at com.android.layoutlib.bridge.impl.Layout.createActionBar (Layout.java:277) at com.android.layoutlib.bridge.impl.Layout. (Layout.java:161) at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate (RenderSessionImpl.java:288) at com.android.layoutlib.bridge.Bridge.createSession (Bridge.java:384) at com.android.tools.idea.layoutlib.LayoutLibrary.createSession (LayoutLibrary.java:193) at com.android.tools.idea.rendering.RenderTask.createRenderSession (RenderTask.java:544) at com.android.tools.idea.rendering.RenderTask.lambda $ inflate $ 3 (RenderTask.java:678) at java.util.concurrent.FutureTask.run (FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor $ Worker.run (ThreadPoolExecutor.java:617) at java.lang.Thread.run (Thread.java:745)
It does not let me make designs and you can not see the elements.
