prequest3: 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/prequest3 - from package: python3-pyramid

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

Error in other languages:
prequest3: bevel nie gevind nie
prequest3: comandă negăsită
prequest3: comando não encontrado
prequest3: commande introuvable
prequest3: command not found
prequest3: käsku ei ole
prequest3: không tìm thấy lệnh
prequest3: komanda nerasta
prequest3: Kommando nicht gefunden.
prequest3: kommandot finns inte
prequest3: komut yok
prequest3: nie znaleziono polecenia
prequest3: níor aimsíodh an t-ordú
prequest3: no se encontró la orden
prequest3: no s'ha trobat l'ordre
prequest3: opdracht niet gevonden
prequest3: parancs nem található
prequest3: perintah tidak ditemukan
prequest3: príkaz nenájdený
prequest3: příkaz nenalezen
prequest3: команда не найдена
prequest3: командата не е открита
prequest3: 命令找不到
prequest3: コマンドが見つかりません