removeSchema.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/removeSchema.py - from package: cinnamon-common

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

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