nova-spicehtml5proxy: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/nova-spicehtml5proxy - from package: nova-consoleproxy

You may install the required package with command apt-get install {package}

Error in other languages:
nova-spicehtml5proxy: bevel nie gevind nie
nova-spicehtml5proxy: comandă negăsită
nova-spicehtml5proxy: comando não encontrado
nova-spicehtml5proxy: commande introuvable
nova-spicehtml5proxy: command not found
nova-spicehtml5proxy: käsku ei ole
nova-spicehtml5proxy: không tìm thấy lệnh
nova-spicehtml5proxy: komanda nerasta
nova-spicehtml5proxy: Kommando nicht gefunden.
nova-spicehtml5proxy: kommandot finns inte
nova-spicehtml5proxy: komut yok
nova-spicehtml5proxy: nie znaleziono polecenia
nova-spicehtml5proxy: níor aimsíodh an t-ordú
nova-spicehtml5proxy: no se encontró la orden
nova-spicehtml5proxy: no s'ha trobat l'ordre
nova-spicehtml5proxy: opdracht niet gevonden
nova-spicehtml5proxy: parancs nem található
nova-spicehtml5proxy: perintah tidak ditemukan
nova-spicehtml5proxy: príkaz nenájdený
nova-spicehtml5proxy: příkaz nenalezen
nova-spicehtml5proxy: команда не найдена
nova-spicehtml5proxy: командата не е открита
nova-spicehtml5proxy: 命令找不到
nova-spicehtml5proxy: コマンドが見つかりません