Xfinity app security risk

My Xfinity app keeps reporting it's blocked a security risk on one of my computers. I have multiple computers, but it only reports this problem on one of them. They are all up to date Windows 11 computers. I believe the reason it sees this risk is because that computer is running an ftp app, which I have used for years, and know to be safe. How do I make the app stop reporting this machine as having a security risk.