If you are the site collection administrator and you can’t show your Managed Properties content in your display template even if you can search on it, hereby what to do :
So if you created your Managed Properties by this menu in your site settings :
You should go there and delete it.
Then you need to go on your SharePoint Virtual Machine, going to Central Administration :
Clicking on the Manage Service Application
And then on Search Service Application, by the way make sure that this is on running status.
Select the Search Schema
Then create your Managed Properties again, please keep in mind that your Managed Properties needs to be Safe, Queryable, Searchable, Retrievable to be fully working on your display template.