Adobe Flash Player: "Your antivirus software must allow you to install software."

Hi!I've been trying to download abobe flash player for two months now and before I can click the button, it disappears and say, "Your antivirus software must allow you to install software." Previously I had to wipe out my computer, but I don't believe any files regarding this was deleted. I did have to get rid of adobe creative cloud. I don't have antivirus software, so I don't know what this is talking about. Can someone help me figure this out? P.s. I have a macbook pro.