Snipets are not displayed

When I load up that page I get this error in the Javascript console: https://cl.ly/image/41233X1B2Q06. The lines for these errors are the lines that generate the height of the snippet display box – they are inline blocks of code (script tags) that appear just before your closing body tag. The problem is that jQuery isn’t being loaded on your site, so these scripts are incapable of running. WordPress has jQuery loaded by default, so I’m not sure what changes you’ve made to your site, but you seem to have prevented jQuery from loading. Fix that issue and then your snippets will show just fine.