Unbrick Samsung Galaxy Core Prime SM-G360V

I need to know how to un-**softbrick** the Samsung Galaxy Core Prime. I don't know how it got bricked, I was just asked to fix it. It looks like a bootloop issue. The Product name is **SM-G360V**. I have already attempted flashing TWRP on it with Odin3, but it fails saying SECURE CHECK FAIL : recovery and the next line is Custom Binary(recovery) Blocked By R/L. I have no idea how to flash a custom ROM (of which I can't find) without a custom recovery.