Package: x2goclient
Version: 4.0.5.1-4.0.5.2

windows version -  8, 8.1, 10

The message in logs is following, and so sshd server won't start:
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0770 for '/cygdrive/C/Users/***/.x2go/etc/ssh_host_dsa_key' are
too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
key_load_private: bad permissions
Could not load host key: /cygdrive/C/Users/***/.x2go/etc/ssh_host_dsa_key
Disabling protocol version 2. Could not load host key
sshd: no hostkeys available -- exiting.