Infotable to Collection Widget (Basic Only)

Im very new to Thingworx and Im trying to build my capability.

I am using collection widget with data source from a service in the Thing I created.

Inside the collection widget, a mashup is already defined but it doesnt seem to load when I view the mashup.

My service doesnt require a parameter and it will give the infotable when executed.

Infotable (headers are from the datashape I made)

UID Field: KPI

Mashup Property Binding:

{
"KPI": "number",
"VALUE": "string"
}

Child Mashup: Test Collection Data

Pls see screenshots, I cannot troubleshoot it, its not giving anything when I load the mashup