[Risolto] Code Snippets

Background of the issue:
I am trying to check if Code Snippets works on my site. The issue can be seen at the following link: https://wpml.org.

Symptoms:
I expected to see something specific, but instead, I got an unexpected result.

Questions:
What could be causing the Code Snippets not to work as expected?
How can I resolve the issue with Code Snippets?