Reply To: Avast antivirus stopped working

In order to use CleanBrowsing, you’ll have to disable Avast’s SecureDNS feature.

https://help.avast.com/en/av_free/12/etc_tools_secure_dns_overview.html

Hopefully they’ll add that link to their troubleshooting page:

https://cleanbrowsing.org/guides/common-questions-troubleshooting-cleanbrowsing