Roblox Blocked: Advanced Protection
Popular online platform Roblox has an experimental anti-cheat that's newly invasive to combat exploiters on their platform. Problem being the latest version is blocked by Bitdefender. I highly advise Bitdefender work fast to resolve this auto-blocking before customers start picking up this is the source of the issue. (It's already on their websites development forums and people are uninstalling).
Roblox operates by running a request from the browser to the launcher application to join game instances. Their new antivirus is called Byfron. I don't have much more information to give.