[Need Help] Can't unlock bootloader on Samsung Galaxy Core Prime

Hi, I'm new here and I'm new at rooting/Modding android devices.

So first of all I have a Samsung Galaxy Core Prime (SM-G361F) I got it from T-Mobile and its running Android version 5.1.1

I was trying to root it and the only way i was able to root it was to flash a pre-rooted firmware from Here

Now I wanted to install TWRP custom recovery so I went over on this Site and tried every method listed there, especially the Odin install method. When I go into Download mode/Odin Mode it says:

Code:

---

ODIN MODE(MULTI CORE DOWNLOAD)
PRODUCT NAME: SM-G361F
CURRENT BINARY: Custom
SYSTEM STATUS: Custom
FRP LOCK: OFF
KNOX WARRANTY VOID: 0x0
Secure Download : Enabled
RP SWREV: S1, L1, M1

---

At this point I got Odin v3. 10 running and flashed TWRP on my device (in Odin I says PASS!), then it restarted and booted normally into Android. I powered it off and then I held the key combo to enter recovery mode (volume up+home+power) and after it vibrated the Samsung Galaxy Core Prime logo comes on with the powered by Android thing and on the top left corner it says in red text "RECOVERY IS NOT SEANDROID ENFORCING" and nothing happens if I hold the power button for 10 seconds it shuts down and I am able to enter the Download/Odin mode with the proper key combo (volume down+home+power) but can't boot into TWRP or Android any more. What did I do wrong? Any help would be much appreciated.

Download from this link