activerecord - Rails Chartkick Gem Error Loading Chart No Adapter Found -

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I have a Rail 3.2.14 app where I use the chartkick and

When I load my view, I get an error: error loading chart: no adapter was found

here How my view code looks like:

index.html.erb

& lt;% = line_chart call.group_by_week (: created_at) Count% & gt;

Charts and yielding chart_js application.html.erb (layout) 

  & lt;% = javascript_include_tag "application "," Charticon "% & gt; & Lt;% = yield: charts_which% & gt; Can anyone tell me why I am getting this error and how it should be decided? I really want to start using ChartCike to generate some simple charts.   
 
 
  
 this line is  and  javascript_include_tag "// Www.google.com/jsapi"% & gt;  before  & lt; % = Javascript_include_tag "applications", "chartsick"%>  Also check the installation section in Mani's home page (scroll down :)).

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