Z3x Help error could not connect to server

Greetings Colleagues, I have been with this problem of Z3x for several days, error could not connect to server I already tried with VPN, I do not have any crack on the pc, installed the last update, in short, someone who has some solution to the problem ,,, Thank you

Checking Login and Password... OK
Ballance: 50 crd.
You have 50 credit(s) left. This operation takes 10 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G530T
Android version: 5.1.1
PDA version: G530TUVS2AQE3
CSC version: G530TTMB2AQE3
Phone version: G530TUVS2AQE3
Product code: SM2G530TZAATMB
CSC country code: USA
CSC sales code: TMB
Phone SN: R28G700AFQD
IMEI:
HW version: REV0.1
RF cal date: 2015.07.01
Chip name: MSM8916
Modem board: MSM8916
Security patch: 2017-05-01
Boot Warranty bit: 1
SIM State: ABSENT
Checking Super user right... true
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Rebooting to upload... OK
Searching Ramdump interface... COM18 detected
Reading data from phone... OK
Calculating... OK
Searching server... error
could not connect to server
Done with Samsung Tool PRO v.34.8