Can't set up Vue-Grid-layout in my application - vue.js

Question

I'm trying to follow the setup guide here to add the grid layout into my Electron/Vue application. I'm getting an error "Error: Layout must be an array!"
My code is below...
<template>
<div id="wrapper">
<img id="logo" src="~#/assets/logo.png" alt="electron-vue">
<main>
<div class="left-side">
<span class="title">
Connection to OMS Database
</span>
<system-information></system-information>
</div>
<div class="right-side">
<grid-layout
:layout="layout"
:col-num="12"
:row-height="30"
:is-draggable="true"
:is-resizable="true"
:vertical-compact="true"
:margin="[10, 10]"
:use-css-transforms="true"
>
<grid-item v-for="item in layout"
:x="item.x"
:y="item.y"
:w="item.w"
:h="item.h"
:i="item.i">
{{item.i}}
</grid-item>
</grid-layout>
</div>
</main>
</div>
</template>
<script>
import SystemInformation from './LandingPage/SystemInformation'
import VueGridLayout from 'vue-grid-layout';
var GridLayout = VueGridLayout.GridLayout;
var GridItem = VueGridLayout.GridItem;
var testLayout = [
{"x":0,"y":0,"w":2,"h":2,"i":"0"},
{"x":2,"y":0,"w":2,"h":4,"i":"1"},
{"x":4,"y":0,"w":2,"h":5,"i":"2"},
{"x":6,"y":0,"w":2,"h":3,"i":"3"},
{"x":8,"y":0,"w":2,"h":3,"i":"4"},
{"x":10,"y":0,"w":2,"h":3,"i":"5"},
{"x":0,"y":5,"w":2,"h":5,"i":"6"},
{"x":2,"y":5,"w":2,"h":5,"i":"7"},
{"x":4,"y":5,"w":2,"h":5,"i":"8"},
{"x":6,"y":4,"w":2,"h":4,"i":"9"},
{"x":8,"y":4,"w":2,"h":4,"i":"10"},
{"x":10,"y":4,"w":2,"h":4,"i":"11"},
{"x":0,"y":10,"w":2,"h":5,"i":"12"},
{"x":2,"y":10,"w":2,"h":5,"i":"13"},
{"x":4,"y":8,"w":2,"h":4,"i":"14"},
{"x":6,"y":8,"w":2,"h":4,"i":"15"},
{"x":8,"y":10,"w":2,"h":5,"i":"16"},
{"x":10,"y":4,"w":2,"h":2,"i":"17"},
{"x":0,"y":9,"w":2,"h":3,"i":"18"},
{"x":2,"y":6,"w":2,"h":2,"i":"19"}
];
export default {
name: 'landing-page',
components: { SystemInformation, GridItem, GridLayout },
layout: testLayout,
methods: {
open (link) {
this.$electron.shell.openExternal(link)
}
},
}
</script>
I tried importing the library using import and require but I keep getting the array issue. Not sure why it's going wrong.
Thank you for taking time to help.