bookworm konquerer, fish not working, sftp problems

[debianlist]

Hallo,

fish is not working anymore in konquerer
Additional I have problems konquerer and sftp

konquerer:
sftp://EXTERNIP:22/root OK
sftp://root@EXTERNIP:22/root NOT OK
sftp://user@EXTERNIP:22/root NOT OK

console:
sftp -v user@EXTERNIP:/home OK
sftp -v root@EXTERNIP:/root/bin OK


I would like to have access with different user to the files to edit, 
for example using kate.

best regards