Running the demo command in the CLI using off-heap generates a NoClassDefFoundError

XAP CLI xap demo: java.lang.NoClassDefFoundError: com/gigaspaces/blobstore/offheap/OffHeapBlobStoreStatistics

1. run xap demo
2 Use web-ui that runs as a part of xap demo command
3. deploy attached jar.
4. Go to Space view and drill down to space, select Used-offheap column
5. See following exception:

[webui][2/32388] 2018-03-21 15:35:00.913:WARN:/:qtp1227074340-98: Exception while dispatching incoming RPC call
[webui][2/32388] com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.util.LinkedList com.gigaspaces.admin.webui.client.SpaceRuntimeInfoService.getSpaceInstancesOffHeapStatistics(java.lang.String,java.util.ArrayList)' threw an unexpected exception: java.lang.NoClassDefFoundError: com/gigaspaces/blobstore/offheap/OffHeapBlobStoreStatistics
[webui][2/32388] at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
[webui][2/32388] at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)