Z3x server error

REPAIR INSTRUCTIONS:
1. Power on the phone.
2. Enable 'USB debugging' in 'Settings'-'Developer options',
tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Reboot to...' button and select mode to reboot (download or recovery).

Operation: Repair
Selected model: SM-G615F
Software version: 37.0

Waiting ADB device... OK
Reading phone info...
Model: SM-G615F
Android version: 7.0
PDA version: G615FXXU2ARB2
CSC version: G615FODD2ARB2
Phone version: G615FXXU2ARB2
Product code: SM-G615FZKDBNG
CSC country code: Bangladesh
CSC sales code: BNG
Phone SN: R28J72B2A7W
IMEI: 358514080147505
HW version: MP 0.200
RF cal date: 20170719
Chip name: MT6757
Modem board: MT6757
Security patch: 2018-02-01
Boot Warranty bit: 1
SIM State: ABSENT,ABSENT
Searching server... error
could not connect to server

Done with Samsung Tool PRO v.37.0