fresh_rate_info: 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/lib/plainbox-providers-1/checkbox/bin/fresh_rate_info - from package: plainbox-provider-checkbox

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

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