Can't add DDNS hostname (myfirewall.co)

I'm not able to use Sophos DDNS service from last few weeks. Please help to rectify the issue. Thanks.

Please refer to my logs below:-

Jan 04 22:54:22.324167 [MSG] connect_to_server() Gonna resolve 'peak.wing.sophosxl.net'
Jan 04 22:54:22.324339 [ERR] number of ip's '1'
Jan 04 22:54:22.324371 [MSG] post_connect_to_wings() '52.26.29.75'
Jan 04 22:54:22.324395 [MSG] try_connect_to_wings() WINGs `peak.wing.sophosxl.net` on port `443` retry #0
Jan 04 22:54:22.324554 [MSG] try_connect_to_wings() connecting to '52.26.29.75' port '443'
Jan 04 22:54:22.324762 [MSG] try_connect_to_wings()conn in progress `peak.wing.sophosxl.net` on port `443` fd `7`
Jan 04 22:54:22.540259 [ERR] handle_inprogress() connect failed for fd '7'
Jan 04 22:54:22.540359 [ERR] shutdown_server(): fd '7'
rm: can't remove '/sdisk/WING/tmp_po/*': No such file or directory
Jan 04 22:54:22.545890 [MSG] Terminating fd '7'
Jan 04 22:54:22.545983 [MSG] event_processor() fd '7', something wrong in reader..

Below are the errors when I try to add new ddns hostname (xxx.myfirewall.co)

Jan 04 22:57:51.597689 [MSG] process_request: tlv->type: 20 'add_ddns_acc', tlv->length: 31
Jan 04 22:57:51.597794 [ERR] tlv_add_ddns_acc() not connected to WINGs!