Samsung G900T3 Unloking error

So when I tried to unlock I get this error.

UNLOCK INSTRUCTIONS:
1. Power on the phone.
2. Type *#0808# and select ‘DM+MODEM+ADB’.
3. Type *#9090# and select ‘DM/DUN over HSIC’.
Or use ‘Activate Diag’ function from ‘Repair’ tab.
4. Connect phone to PC with USB cable, install drivers if needed.
5. Select diagnostic port in port settings.
6. Press ‘Unlock’ button for direct unlock.

To reset Google account activation or Samsung reactivation lock:
1. Power on phone in download mode (turn off phone, press vol.down + home + power).
2. Connect phone to PC with USB cable, install drivers if needed.
3. Press ‘Reset FRP/React/EE’ to deactivate Google/Samsung/EE account activation lock.
(Sometimes needs to perform ‘wipe data/factory reset’ once more, to complete this locks removal.)

Operation: Unlock
Selected model: SM-G900T3
Software version: 27.1

Port not selected

Done with Samsung Tool PRO v.27.1