The NX services not available or the NX access was disabled on host

Cara menanganinya yaitu jalankan perintah dibawah ini

cat /var/lib/nxserver/home/.ssh/client.id_dsa.key

copy data yang ditampilkan ke nx client di sini saya memakai windows untuk nx client nya

masuk ke Configure > General > Key paste semua data yang di tampilkan tadi di kolom DSA Key

example :

-----BEGIN DSA PRIVATE KEY-----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-----END DSA PRIVATE KEY-----

dan pilih save.