Unable to delete Editable Template on Dispatcher rendered AEM 6.5 instance with Service Pack 7

Hi all,

We are not able to delete editable template on dispatcher rendered AEM 6.5 instance with service pack 7 installed.

Error while deleting  newly created template which is not referenced in any page:

Steps followed:

1. Login to dispatcher server http://local.author.abc.com/libs/wcm/core/content/sites/templates.html/conf/we-retail

2. Create a new template say TestTemplate

3. Delete this TestTemplate in draft/enable mode

we see below error:

Uncaught SyntaxError: Unexpected token o in JSON at position 1
at JSON.parse (<anonymous>)

Error is thrown due to JSON.parse() method in templatedelete.is. data is passed as Object instead of String

 /libs/cq/gui/components/siteadmin/admin/templates/clientlibs/js/templatedelete.js

function handleDeleteRequest(paths) {
return $.ajax({
url: "/libs/wcm/core/content/sites/templates/usage.json",
type: "GET",
data: {
_charset_: "UTF-8",
path: paths
},
success: function(data) {
ui.clearWait();

// usages found
if (data && JSON.parse(data).anyTemplateUsed) {

We can delete editable templates from path http://localhost:4502/libs/wcm/core/content/sites/templates.html/conf/we-retail

Are there any configuration in dispatcher.any that we have to allow in order to delete Editable Templates.

Any help will be appreciated.

Thanks

Hina