UiMetaModel XML is Invalid.

A developer is going through the "Configuring NEO Widgets" tutorial and got the error message "UiMetaModel XML is Invalid."

screenshot:

code from line 32 of the developer's UiMetaModel:

<NeoWidgetType name="MoneySpent" componentPath="PLT/Widgets/KPI">
	<AllowedLayouts>COLUMNAR,FIXED,FLEXIBLE</AllowedLayouts>
	<PreviewImagePath>/oms/img/neo/widgets/kpi/kpi1.png</PreviewImagePath>
	<Config>
{                   
  "reportName": "EXTR.TransactionTotal",
  "valueColumnName": "EXTR$Transaction$PriceAmount",
  "uomColumnName": "EXTR$Transaction$PriceUOM",
  "severityColumnName": "Undefined$PRICE_AMOUNT",
  "emptyValue": "0",
  filters: {filters: {"Undefined$Timeline_displayValue":"Money Spent","Undefined$Timeline":"Money Spent"}}
}

What is the best way to solve this issue?