Hey there SeaGlow! 🙂
That's an odd issue. I'm guessing you've tried a factory reset and stuff? Have you enabled Developer Options at all? Also, have you made, or attempted to make, any changes to the firmware on your phone? (Stuff like rooting, reflashing from tools like Odin etc) This type of error usually occurs when your phone detects rooting. Your phone has an "e-fuse", which will trip when your phone detects rooting.
You might want to look at having your phone serviced, however if you've attempted firmware modifications, your phone might not be covered under warranty.
To help a bit further, could you go to Settings>About Phone>Status and could you take a screenshot. If you can, crop the image. I wanted to check the Phone Status, which will either say Official or Custom.
Hope this helps, and keep being awesome!
Tom 🙂