Config file
Solaris
Version: 11.4 (Oracle Solaris 11.4.56.138.2)
Could you please let us know which file (is it "/etc/ssh/ssh_config or else "/etc/ssh/sshd_config) need to be added with below entries:
HostKeyAlgorithms +ssh-rsa
PubkeyAcceptedAlgorithms +ssh-rsa