Hello,
Since 19 October the free version is, sadly, useless. Random lan / wan sites are blocked and a lot of SSL sites unable to load (in Google Chrome we have this error "ERR_EMPTY_RESPONSE"). If you uncheck the "Protection Shield" all connections are made again correctly.
If you uninstall the antivirus and after that you install it again, everything will work perfectly until first bitdefender update is automatically installed.
So, keep in mind, the issue came from a bad definition or something like that.
Until 19 October all connections were made correctly (lan, wan, ssl, tls, etc.).
Thank you in advance !
Andrei