The first solution was to add the missing MIME types to my web.config, like so:
<system.webServer> <staticContent> <remove fileExtension=".json" /> <mimeMap fileExtension=".json" mimeType="application/json; charset=UTF-8" /> </staticContent> </system.webServer>
Redeploy, refresh. Now I had a bunch of errors with other scripts that were working fine, almost every script was throwing a 500 error. More Googling and cussing and publishing and refreshing and nothing. Eventually I spotted a small note on someone’s post on StackOverflow where they mentioned changing the BuildAction for the .json files to ‘Content‘ instead of ‘None’. I’m not sure what affect this has and will look in to it another time, but for now it solves my problem and hopefully yours too!