swift-reconciler-enqueue: command not found

Have You tried accessing the binary with the full path?

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

[root@server ~]# echo $PATH

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/swift-reconciler-enqueue - from package: swift-container

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