Template can not found.

[Deimos620]

I am using angular-modal-service as modal service of Angular based web application I am building.
Here is my code.

 ModalService.showModal({
            templateUrl: "views/modals/edit_report_draft.html",
            controller: "DraftReportController"
        }).then(function(modal){
            modal.element.modal();
            console.log("modal displayed");
        })

But, when I click the button to show up modal, keep getting this error:

http://localhost:8001/views/modals/edit_report_draft.html 404 (Not Found)

The path of modal template is relative path from angular application root folder.
Would you like to help me to fix this problem? It seems it requests template from the server, so should I config routing for this modal template?
I am using Angular v1.6