I'm somewhat new to Umbraco, but I'm moving from v8 to v12 and I'm trying to sort out some problems.

I'm getting this error when using Html.RequireJs.

'IHtmlHelper<dynamic>' does not contain a definition for 'RequiresJs' and no accessible extension method 'RequiresJs' accepting a first argument of type 'IHtmlHelper<dynamic>' could be found (are you missing a using directive or an assembly reference?)

Does anyone know how to resolve this in v12?

Here is the code I'm using from v8.

@{
Html.RequiresJs("/scripts/modernizr-2.8.3.js",1);
Html.RequiresJs("/scripts/jquery-1.11.2.min.js",2);
Html.RequiresJs("/scripts/jquery.validate-vsdoc.js",3);
Html.RequiresJs("/scripts/jquery.validate.min.js",4);
Html.RequiresJs("/scripts/jquery.validate.unobtrusive.min.js",5);
Html.RequiresJs("/scripts/jquery.form.min.js",6);
Html.RequiresJs("/scripts/jQuery.tmpl.min.js",7);
Html.RequiresJs("/scripts/moment.min.js",8);
Html.RequiresJs("/scripts/bootstrap.min.js",9);
Html.RequiresJs("/scripts/jquery.tiltedpage-scroll.js",10);
Html.RequiresJs("/scripts/images.loaded.min.js",11);
Html.RequiresJs("/scripts/jquery.waypoints.min.js",12);
Html.RequiresJs("/scripts/parallax.min.js",13);
Html.RequiresJs("/scripts/readmore.min.js",14);
Html.RequiresJs("/scripts/app.js",15);
Html.RequiresJs("/scripts/validations/moduleDependency.js",16);
Html.RequiresJs("/scripts/data/ajax.js",17);
Html.RequiresJs("/scripts/utils/common.js",18);
Html.RequiresJs("/scripts/utils/dialog.js",19);
Html.RequiresJs("/scripts/utils/alerts.js",20);
Html.RequiresJs("/scripts/utils/template.js",21);
Html.RequiresJs("/scripts/modules/base.js",22);
Html.RequiresJs("/scripts/modules/accessibility.js",23);
Html.RequiresJs("/scripts/modules/serviceCards.js",24);
Html.RequiresJs("/scripts/site.js",25);
Html.RequiresJs("/scripts/js-cookie.min.js",26);
Html.RequiresJs("/scripts/cookies.js",27);