Tornado server access denied for fligth review deployed in the cloud


I deployed the px4 flight review on an online linux server, starting ./, I can see the page when typing the IP:5006 in my web browser, but when I upload a log I get the following error.

Moving uploaded file to /root/flight_review/plot_app/…/data/log_files/xxxx.ulg
Error when handling POST data <class ‘FileNotFoundError’> [Errno 2] No such file or directory: ‘/root/flight_review/plot_app/…/data/log_files/xxxx.ulg’
ERROR:tornado.access:500 POST /upload (xx.xx.xx.xx) <— this is my the ip from where I uploaded

Any idea on what can happen?