Live Preview Not Loading

I just created a website that will be used as a personal blog. I used DigitalOcean as my host and installed wordpress through its one-click application installs.

When I went to try to customize the appearance of the pages, the toolbar of the customize loads but the Live Preview of the site keeps spinning and doesn’t load. Its quite frustrating to design when I can’t actually see the difference it makes. If I can fix this, the developing of the site would go by much faster and easier.