Link OWA webApp to reference application but it's not linking in right.What I am doing wrong.

I am able to use COHORT webApp through administration page,but I want to link it in my reference application by using the following config JSON.But It does not link correctly.What I am missing or doing wrong.

{ “id”: “systadmin”, “description”: "modern refresh of the OpenMRS Cohort Builder tool ", “order”: 0, “extensions”: [ { “id”: “demoapp.homepageLink”, “extensionPointId”: “org.openmrs.referenceapplication.homepageLink”, “type”: “link”, “label”: “CohortBuilder”, “url”: “owa/cohortbuilder/index.html”, “icon”: “icon-list-alt”, “requiredPrivilege”: “administrator” } ] } }

By clicking on ICON it shows me this.

by changing the url I solved it.