matteocontrini Looking at your site, you have
<script>(adsbygoogle=window.adsbygoogle||[]).pauseAdRequests=1</script>
in your head tag.
Which would prevent ads from showing. I'm guessing is an attempt to comply with GDPR, but I don't think you have fully implemented it properly.
Try removing that from your head tag, if ads start working again, I can help you with a full script to comply with GDPR and still have ads working.