aaP_teguh_nurdiansyah can you 2x confirm on the wwwroot access right?
ls -l /www

in some situation, the permission for the wwwroot folder is www-data instead of www, and you would need to change it to www-data in chown.
lastly, do you have python3 installed?
if yes, can you verify if your python execution is py3 or python3 or py?