Weird lock screen says "Oops, really?" Where did this come from?

[Android Central Question]

All of a sudden, when I access my phone, I have a weird lock screen that says "Oops, really? One more chance. Please. If closed, Lock Screen won't bring any convenience to you." Then there are two choices: "Yes, pretty sure" and "No. Maybe later." Does anyone have any idea where this came from, and how to get rid of it?

 

[belodion]

Re: Weird lock screen says "Oops, really?" Where did this come from?

Does it persist in Safe Mode?
https://forums.androidcentral.com/showthread.php?t=409154

 

[npmathis]

Thanks in advance for your help! It does NOT persist in safe mode.

 

[npmathis]

Well ... a big "DUH" for me! I forgot that had installed a QR code scanner, , it turns out, was the culprit! I had installed several days ago, but the weird screen just came up yesterday ...