SSH connection using SSH Gateway problem with known_hosts

Hello,

First of all, thanks for your attention.

I started with RDM today and everything work very fine in MacOS.

But in my Linux distribution Elementary OS 5.1.7 and KDE Neon 5.20 the SSH connection using SSH Gateway Jump Host the system returns this message:

[12/4/2020 2:12:43 AM] New Data 496 bytes
[12/4/2020 2:12:43 AM] Received kex init
[12/4/2020 2:12:43 AM] Selected algorithms: diffie-hellman-group-exchange-sha256, ssh-rsa, aes256-ctr, aes256-ctr, hmac-sha1-96, hmac-sha1-96, none, none
[12/4/2020 2:12:43 AM] Sending diffie-hellman group exchange request
[12/4/2020 2:12:43 AM] New Data 280 bytes
[12/4/2020 2:12:43 AM] Received diffie-hellman group of size: 2048
[12/4/2020 2:12:43 AM] Sending diffie-hellman group exchange kex init
[12/4/2020 2:12:43 AM] New Data 592 bytes
[12/4/2020 2:12:43 AM] Received diffie-hellman group exchange kex reply
[12/4/2020 2:12:43 AM] No path to known_hosts file for server authentication
[12/4/2020 2:12:43 AM] Connection aborted during SSH server authentication
[12/4/2020 2:12:43 AM] Received new keys message
[12/4/2020 2:12:43 AM] Disconnection in progress
[12/4/2020 2:12:43 AM] Sending channel close request: 0/0
[12/4/2020 2:12:43 AM] Disconnecting

If I use dirrect connection, it works fine in anyone devices. But if i use SSH Gateway Jump Host, I receive it.

Could anyone help me please?

Thanks advance