XletSettingsWidgets.py: 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/share/cinnamon/cinnamon-settings/bin/XletSettingsWidgets.py - from package: cinnamon-common

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

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