Can't open spark tutorial note in 0.8.0-SNAPSHOT

150  INFO [2017-06-15 12:35:04,635] ({qtp390709800-15} NotebookServer.java[sendNote]:799) - New operation from 0:0:0:#
151 ERROR [2017-06-15 12:35:04,638] ({qtp390709800-15} NotebookServer.java[onMessage]:377) - Can't handle message
152 com.google.gson.JsonParseException: cannot serialize org.apache.zeppelin.display.Input; did you forget to registe#
153 ›   at org.apache.zeppelin.display.RuntimeTypeAdapterFactory$1.write(RuntimeTypeAdapterFactory.java:129)
154 ›   at com.google.gson.TypeAdapter$1.write(TypeAdapter.java:191)
155 ›   at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
156 ›   at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:209)
157 ›   at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:146)
158 ›   at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
159 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)
160 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java#
161 ›   at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
162 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)
163 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java#
164 ›   at com.google.gson.TypeAdapter.toJsonTree(TypeAdapter.java:230)
165 ›   at org.apache.zeppelin.json.NotebookTypeAdapterFactory$1.write(NotebookTypeAdapterFactory.java:58)
166 ›   at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
167 ›   at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java#
168 ›   at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java#
169 ›   at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
170 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)
171 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java#
172 ›   at com.google.gson.internal.bind.ObjectTypeAdapter.write(ObjectTypeAdapter.java:105)
173 ›   at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
174 ›   at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:209)
175 ›   at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:146)
176 ›   at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)
177 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)
178 ›   at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java#
179 ›   at com.google.gson.Gson.toJson(Gson.java:582)
180 ›   at com.google.gson.Gson.toJson(Gson.java:561)
181 ›   at com.google.gson.Gson.toJson(Gson.java:516)
182 ›   at com.google.gson.Gson.toJson(Gson.java:496)
183 ›   at org.apache.zeppelin.socket.NotebookServer.serializeMessage(NotebookServer.java:414)
184 ›   at org.apache.zeppelin.socket.NotebookServer.sendNote(NotebookServer.java:823)
185 ›   at org.apache.zeppelin.socket.NotebookServer.onMessage(NotebookServer.java:243)
186 ›   at org.apache.zeppelin.socket.NotebookSocket.onWebSocketText(NotebookSocket.java:59)
187 ›   at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextMessage(JettyListenerEventDriver.#
188 ›   at org.eclipse.jetty.websocket.common.message.SimpleTextMessage.messageComplete(SimpleTextMessage.java:69)
189 ›   at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.appendMessage(AbstractEventDriver.java:65)
190 ›   at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextFrame(JettyListenerEventDriver.ja#
191 ›   at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingFrame(AbstractEventDriver.java:161)
192 ›   at org.eclipse.jetty.websocket.common.WebSocketSession.incomingFrame(WebSocketSession.java:309)
193 ›   at org.eclipse.jetty.websocket.common.extensions.ExtensionStack.incomingFrame(ExtensionStack.java:214)
194 ›   at org.eclipse.jetty.websocket.common.Parser.notifyFrame(Parser.java:220)
195 ›   at org.eclipse.jetty.websocket.common.Parser.parse(Parser.java:258)
196 ›   at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.readParse(AbstractWebSocketConnection.ja#
197 ›   at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.j#
198 ›   at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
199 ›   at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
200 ›   at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
201 ›   at java.lang.Thread.run(Thread.java:745)
202  WARN [2017-06-15 12:35:04,641] ({qtp390709800-15} GitNotebookRepo.java[revisionHistory]:157) - No Head found for#