Why does factory reset not fix unauthorized actions error on a Galaxy S&? What else can I do?

I backed up my data and then tried to root my S7 to recover lost photos. It got into a bootloop with the Samsung word on the screen and I eventually factory reset it. The phone seems to work fine and I restored my data. However, it now has a constant error saying that, "Unauthorized actions have been detected. Please restart your phone to undo these actions." Would appreciate some help on how to fix this. Thanks.

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