When I use WinSCP from another server, I can successfully connect to this FTP server using FTPS.
When I use WinSCP from a desktop in my office, I get the message:
And I cannot connect.AUTH command ok. Expecting TLS Negotiation.
So this seems related to my desktop configuration, which is a Windows 10 PC connected to a Tenda 4G router.
Any idea on how to diagnose this deeper and fix it?