yhsm-decrypt-aead: 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
/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/yhsm-decrypt-aead - from package: yhsm-tools

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