Chart is not Working. Anyone please help me to short it out

Question

Dear All,

 

I am trying to create a dynamic chart by using web service and javascript. But it regularly showing error. 

 

Please help me on that.

 

Reference: https://codepedia.info/chart-js-asp-net-dynamically-create-line-chart-with-database-ms-sql-using-jquery-ajax-c-example/ 

 

Code Attached