ng-include compiles to a comment

You only use src="" when using ng-include as an element:

<ng-include src="'/partial.html'"></ng-include>

When using ng-include as an attribute, you put the partial URL right in the attribute itself:

<div ng-include="'/partial.html'"></div>

See https://docs.angularjs.org/api/ng/directive/ngInclude for the two use-cases.

After hours I resolved it for mine, it's all about using single quotes using between double quotes.

<!--it will not work-->
<ng-include src="views/header.html"></ng-include>

<!--it will work :)-->
<!--Difference is single quotes along with double quotes around src string-->
<ng-include src="'views/header.html'"></ng-include>