Brave browser doesnt load websites

After instalation of Avast premium security, my Brave browser cannot reach many regular sites that im using.
The problem is web shield of antivirus, if i turn it off, then everything works pretty good.
I already tried to reinstall the product, but still the same problem. Google or youtube is working.
In mozilla firefox everything works normally…
Where can be the problem and what should i do?
Thx for any advices