uwsgi_xslt: 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/uwsgi_xslt - from package: uwsgi-plugin-xslt

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

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