mwrap: 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/mwrap - from package: mwrap

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

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