Wrong display in wallabag (orizzontescuola.it)

We have a lot of requests about fetching config issue. It'll help us A LOT if you give a try to fix it on your own following the doc. If you failed to fix it yourself, tick the following boxes:

• I've tried myself without success
• I've replaced HOST in the issue title with the host of the URL that can't be fetched (ie: nytimes.com, 20minutes.fr, bbc.com, etc.)

Content related:

• URL: https://www.orizzontescuola.it/riforma-istituti-tecnici-pubblicato-il-decreto-ecco-indirizzi-di-studio-e-quadri-orario-tutte-le-novita/
• wallabag version: 2.6.14

Describe what's wrong: nothing is fetched