I got this error on the Graphical Layout

Failed to find the style corresponding to the id 2130772026 Failed to find the style corresponding to the id 2130771996 java.lang.NullPointerException Exception details are logged in Window > Show View > Error Log The following classes could not be instantiated: - android.support.v7.internal.app.WindowDecorActionBar (Open Class, Show Error Log) See the Error Log (Window > Show View) for more details.

Can someone help me please???