Hi freetvhelpdesk,
It would be interesting to know why Avast blocks your website, let us wait for an Avast Team Member to respond.
We here are volunteers with relevant knowledge. I too certainly doubt that Cloudflare has been flagged, as we do not see Avast flag invalid SSL signatures recently. So wait for an Avast Team Member to reply, he has been informed, but this may be after the weekend.
polonus