My Samsung Galaxy S6 Edge+ is stuck on the boot-up screen, it has the FRP Lock on.

I can get it to the first screen but then it shuts off. There's some red text in the top left corner saying "KERNEL IS NOT SEANDROID ENFORCING" and below it "Custom binary blocked by FRP lock"
Please help ASAP. I really don't know what to do. How can I fix this?

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