I can't get an ssh file serve that goes through the internet

I can connect to the ssh server through my computer for other reasons, but I can’t connect to it through my infuse app on iOs.
“An error occurred” is the error message I get when I try to save the share.

I can use an ssh server on my local area network (using computername.local)

I’m not sure

I add it

via network share

and I choose sftp for the protocol

and use my web host (xxxx.com) for the address

everything else is filled out appropriately

Any ideas?