I have the same exception as Dilan Nipuna. org.vaadin.visjs.networkDiagram.

Directory visjs-addon
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I have the same exception as Dilan Nipuna. org.vaadin.visjs.networkDiagram.NetworkDiagram$9.call(Lelemental/json/JsonArray;)" exception . I am using Vaadin 7.2.7 and the network diagram is inside a horizontalLayout which is inside a Vertical Layout.

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use version 1.0.0.4