Hi, welcome to AC forums, me or other members would be happy to assist you but if we need to ask additional questions you'll need to register as a member to respond . I'll provide a link to register so you can reply and communicate with us .https://forums.androidcentral.com/showthread.php?t=409154
Welcome to Android Central! Are you saying that you see a message or notification that says "Lockscreen capture screenshot"? Where do you see it, and when?