I am stuck at the step where I load the data file in the CarDataStore store. I set the url on property on the data proxy like as instructed. data/cars.json. Previously I extracted the sample data download to C:\inetpub\wwwroot\CarListings\data as instructed.

The error message is:

Unable to load data using the supplied configuration.
Open in Browser:

Preview for the app works ok, so the webserver is running ok. No car data shows in the Grid, but not surprising.

Thanks in advance.