URL: Blacklist

The last few days when I tried to download files from an official website of the italian judicial system the connection was severed and an AVAST communication appeared with the text "URL: Blacklist.
The documents are for sure not contaminated with viruses. The URL is “https://pst.giustizia.it/PST/it/pst_2_1_1_3.wp?actionPath=/ExtStr2/do/consultazioneregistri/sicid/fascicolipersonali/search.action&currentFrame=11”. The connection is interrupted only when I try to download the documents. The documents are in a secured part of the site with access only by authorized people.
How can I resolve the problem?
thanks

Report a false positive (select file or website)
https://www.avast.com/false-positive-file-form.php

https://forum.avast.com/index.php?topic=14433.msg1289438#msg1289438

We have seen this website before. Let me fetch Milos, and have him report here.

Milos reports it’s been cleared by someone else at Avast!. Can you confirm this?