From your other post, it looks like you have solved the problem:
https://winscp.net/forum/viewtopic.php?t=5260#130775
Did you? If not, please post a session log file.

Im surprised in 2026 that still this bug exists....

When connecting via SFTP, it gives the

Received too large (… B) SFTP packet. Max supported packet size is 1024000 B

When connecting via SCP, it stays on Logging on and never finishes.

Please, HOW do I fix this and can WinSCP PLEASE add a fix to this?

Thanks