Finally I have done the migration through ssh keys.
I checked which algorithms the source server supports with: ssh -Q kex
which was:
Code:
diffie-hellman-group1-sha1
diffie-hellman-group14-sha1
diffie-hellman-group-exchange-sha1
diffie-hellman-group-exchange-sha256
ecdh-sha2-nistp256...
If I run the command indicated in the Plesk error from SSH it displays the following information (In the place where the 00 is shown is the real IP)
Warning: Identity file /usr/local/psa/var/modules/panel-migrator/sessions/20230111115500/ssh-keys/id_rsa.00.00.00.000 not accessible: No such file...
When I start a migration from one server to another with the plesk migration tool, it throws me the following error:
Failed to fetch basic information about resellers, clients and domains data from source servers
Cause: Command execution failed on the local server with non-zero exit code...