Hi Everyone, in the module Wave Analytics Trail |Wave Analytics Basics | Creating Your First Wave Analytics App, the user is directed to go to http://startsurfingthewave.herokuapp.com/trailhead_dataflow, and download the file Analytics Trailhead Dataflow.json into a local directory.  Continuing to follow the directions, I go into the Wave Analytics app, navigate to the Dataflow View, click on Settings | Upload, select the Analytics Trailhead Dataflow.json file, and click on the "Upload" button.  Once I do that, I receive the following error: TypeError: Object doesn't support this property or method.  When I click the "Continue" button, the error "Upload failed because the file is not a valid .json file".  If anyone knows how to fix this, I would be grateful.  I don't know why this isn't working since the dataflow file is provided by Salesforce via the link.

Hi Everyone, in the module Wave Analytics Trail |Wave Analytics Basics | Creating Your First Wave Analytics App, the user is directed to go to http://startsurfingthewave.herokuapp.com/trailhead_dataflow, and download the file Analytics Trailhead Dataflow.json into a local directory.  Continuing to follow the directions, I go into the Wave Analytics app, navigate to the Dataflow View, click on Settings | Upload, select the Analytics Trailhead Dataflow.json file, and click on the "Upload" button.  Once I do that, I receive the following error: TypeError: Object doesn't support this property or method.  When I click the "Continue" button, the error "Upload failed because the file is not a valid .json file".  If anyone knows how to fix this, I would be grateful.  I don't know why this isn't working since the dataflow file is provided by Salesforce via the link.