Network Error : Software caused connection abort

HI Support

I've provided the attached log depicting an error

Network Error : Software caused connection abort

While previously it's been connecting fine (been connecting daily to this connection) for year now.
The WinSCP software is up to date @ version 5.21.7
The PC is running Windows 10 OS on our corporate network.
I have even removed the local AV software on their to see if that was blocking.
I have confirmed with our ISP that the WAN Firewall is allowing traffic through so the issue is not at their end.
I can however connect to this from my home PC, outside the corporate network but as I say the ISP has confirmed it is being allowed no problem, so related to Host/software issue it seems
Help??

Now working

How this issue got resolved, share the steps

Looks like one thing that results in this message is

Tunnel errors that happens only once we connect to the local port (server-side forwarding problems). Contrary to local side problems handled already in OpenTunnel.

https://github.com/winscp/winscp/blob/6.3.3/source/core/Terminal.cpp#L1554
NET_TRANSL_CONN_ABORTED is "Network error: Software caused connection abort"
https://github.com/winscp/winscp/blob/6.3.3/source/core/SecureShell.cpp#L1564

Based on that, it looks like its solved by connection or server side stuff.

I'd guess based on the short reply that it might have been a blip and solved without anything done by the user. Either that, or they're one of those that likes to leave it as a mystery :)