Unable to synchronize XG Firewall with Sophos Central

Hello everyone,

Im trying to sync one XG125 (SFOS 18.0.1 MR-1 Build396) with Sophos Central. But when I enter the Sophos Central credentials into the Register option no changes happen in the screen. It shows the loading icon for a little while and then no message appears on the screen.

Based on the other related recomendations seen in this community I looked into these logs:

XG125_XN03_SFOS 18.0.1 MR-1-Build396# tail /log/sophos-central.log
Content-Type: text/plain
Client-Date: Mon, 16 Nov 2020 18:41:06 GMT
Client-Warning: Internal response

Can't connect to utm-cloudstation-us-east-2.prod.hydra.sophos.com:443 (Bad hostname)

LWP::Protocol::https::Socket: Bad hostname 'utm-cloudstation-us-east-2.prod.hydra.sophos.com' at /lib32/perl/site_perl/5.20.1/LWP/Protocol/http.pm line 47.

2020-11-16 15:41:06 INFO API.pm[11725]:120 SFOS::Common::Central::API::send_request - HTTP::Request failed due to a SSL verification error
2020-11-16 15:41:06 INFO central-register[11725]:202 main::_register - Connecting to Sophos Central Station [https://utm-cloudstation-us-east-2.prod.hydra.sophos.com/] failed for the 1 time. Retry in a second.

 For heartbeatd.log and hbtrust.log it didn't show me any results:

XG125_XN03_SFOS 18.0.1 MR-1-Build396# tail /log/heartbeatd.log
XG125_XN03_SFOS 18.0.1 MR-1-Build396#
XG125_XN03_SFOS 18.0.1 MR-1-Build396# tail /log/hbtrust.log
XG125_XN03_SFOS 18.0.1 MR-1-Build396#

XG125_XN03_SFOS 18.0.1 MR-1-Build396# tail -f /log/applog.log
Nov 18 19:30:42
sizeof sg=0, sizeof st=0, sizeof ss=0
Nov 18 19:30:42
Graph[0]= ssl_curr_summary , time[0]= hourly , Substrs[0]=N/A
Nov 18 19:30:42
->input_string=ssl_curr_summary,hourly,N/A
Nov 18 19:31:06 getpublickey success Key: 805481415f71ddb862e86ad75bb6f76a4175
Nov 18 19:35:00 inside heartbeat:HBstatus.....
Nov 18 19:35:01 HBstatus get failedNov 18 19:35:01 heartbeat:HBstatus failed.....
Nov 18 19:35:10 Checking new IPs of fqdn for mta
Nov 18 19:37:16 Request type = 1
Nov 18 19:37:16 apiInterface:versionsupported: true.
Nov 18 19:37:16 apiInterface:request mode -> 1323.
Nov 18 19:37:16 apiInterface:Current ver :::'1800.1'
Nov 18 19:37:16 apiInterface:entityjson::::::::heartbeat::hbcloudregistration=HASH(0xb759740)
Nov 18 19:37:16 Info:: Transaction will not be rolled back for opcode SophosCentralRegistration. If any operation fails, request is part of multiple request :
Nov 18 19:37:16 opcode:SophosCentralRegistration - starting
Nov 18 19:37:19 opcode:SophosCentralRegistration - device is already registered with Sophos Central
Nov 18 19:37:19 APIPARSER CALL FOR GET REQUEST:api_parser -a '1800.1' -i /sdisk/readRequest.xml -v /_conf/csc/IOMappingFiles/ -l /tmp/parser.log -o /sdisk/readRequest.xml
Nov 18 19:37:19 API-Parser /sdisk/api-1605739039108164.txt found.
Nov 18 19:37:19 API-Parser /sdisk/api-1605739039108164.txt size = 0 && script is invoked by api_parser
Nov 18 19:37:53 Request type = 1
Nov 18 19:37:53 apiInterface:versionsupported: true.
Nov 18 19:37:53 apiInterface:request mode -> 1323.
Nov 18 19:37:53 apiInterface:Current ver :::'1800.1'
Nov 18 19:37:53 apiInterface:entityjson::::::::heartbeat::hbcloudregistration=HASH(0xb759730)
Nov 18 19:37:53 Info:: Transaction will not be rolled back for opcode SophosCentralRegistration. If any operation fails, request is part of multiple request :
Nov 18 19:37:53 opcode:SophosCentralRegistration - starting
Nov 18 19:37:55 opcode:SophosCentralRegistration - device is already registered with Sophos Central
Nov 18 19:37:55 APIPARSER CALL FOR GET REQUEST:api_parser -a '1800.1' -i /sdisk/readRequest.xml -v /_conf/csc/IOMappingFiles/ -l /tmp/parser.log -o /sdisk/readRequest.xml
Nov 18 19:37:55 API-Parser /sdisk/api-1605739075932490.txt found.
Nov 18 19:37:55 API-Parser /sdisk/api-1605739075932490.txt size = 0 && script is invoked by api_parser

Meanwhile, in the Sophos Central the device does not show up neither:

I validated DNS resolving and also tried adding a permit any any firewall rule on top.

Is there something else I could try?

Thanks in advanced...