In order to allow loading and downloading json file on your site, you have to add json extension in mime type and handler mappings in IIS windows server. By default this extension is not view-able. Therefore you will need manually mapping json extension into your IIS. To do this, you must have to get an access to your IIS, if you do not have, please request your site administrator to add this extension for you. For users host their sites on GoDaddy or other web hosting providers will need to contact their hosting provider.