Unable to do read codes online

Error when doing read codes on J727VPP

Operation: Read Codes via Server
Selected model: SM-J727VPP
Selected port: COM648 SAMSUNG Mobile USB Serial Port
Software version: 31.0

Checking Login and Password... OK
Ballance: 5 crd.
You have 5 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-J727VPP
Android version: 7.0
Product code: SM2J727VZKPVZW
Phone version: J727VPPVRS2ARC1
PDA version: J727VPPVRS2ARC1
CSC version: J727VPPVZW2ARC1
CSC country code: USA
CSC sales code: VZW
HW version: J727V.02
Phone SN: R28J80RRSAY
Chip name: MSM8953
Modem board: MSM8953
Security patch: 2018-03-01
RF cal date: 2017.08.08
IMEI: 355077081098369
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data from phone... OK
Searching Ramdump interface... COM4 detected
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... error (1)

Done with Samsung Tool PRO v.31.0