I agree there is a problem with Bitdefender VPN. It doesn't work with my Windows 11 Pro on my Dell laptop. I tried all the suggested solution without success. I'm in no hurry to use it so I'm waiting for someone to document and report it.
I did manage to install Bitdefender Total Security and VPN on my regular (not 4K) firestick. I had to use mouse toggle to move the cursor and make VPN work. The VPN seem to work fine when I access site-restricted apps. Sorry but I forgot how I did it after several tries. I am now trying to install it on my 4K firestick…