My Captivate content won't load. It just spins. How do I fix that?

If your Captivate content won't load & just spins the loading icon, you probably need to add .json as a mime type.  For more information, see:  

https://community.adobe.com/t5/captivate/uploading-html5-project-to-web-server/td-p/9265758?page=1