Chartkick无法正确显示面积图

Question

I'm using chartkick along with chart.js. I have it set up just as the docs say. The information coming is correct as far as I can tell. [{"date":"2017-09-30","user":1},{"date":"2017-10-01","user":0},... I have this in my application.js file

 ...  
//= require Chart.bundle
//= require chartkick
//= require_tree .

//= require app

and in my view I have

 <div id="venue-graph" style="height: 500px">
    <%= area_chart graph_data('Venue') %>
 </div>

I'm not really sure what is missing and causing this to not render properly. Thank you for any assistance that is abled to be offered.