as i wrote...
been there
done that.
only avast companies have the problems
The issue is in the expired certificate.
All avast does is tryig to protect you from a possible danger.
Because, in general, visiting sites with expired certificates might result in your computer getting infected by viruses, etc.
Almost any good and non-malicious site makes sure to have proper certificates these days, unless they are being lazy.
If you want to accept the dangers of visiting a site with an expired certificate, you can try adding that site to global exceptions in avast.
By the way, I tried opening that url from your screenshot:
https://p3a.brave.com/And it doesn't even work right now.
Here, I checked it even by this site:
https://downforeveryoneorjustme.com/And it said that that url is down currently.