[Chartjs]-Why i have this error Utils is not defined when i want create a chart from chart.js

The Utils file is not shipped with the library, its a helper file used so the sample charts are easily to maintain for the chart.js team, it also says in the documentation that you should not depend on the file being in this form since its able to change at any moment.

If you really want to use the functions of it you will need to implement them yourself by copying them from the file for example.