Issue with foreign characters as user nobody

[ChronoStriker1]

I am trying to run a pixiv downloader from my server https://nandaka.wordpress.com/tag/pixiv-downloader/ It works as expected when run as a user I created on my server, but when I run the program as nobody I get this error

Traceback (most recent call last):
  File "PixivUtil2.py", line 115, in downloadImage
    if not overwrite and os.path.exists(filename) and os.path.isfile(filename) :
  File "/usr/lib/python2.6/genericpath.py", line 18, in exists
    st = os.stat(path)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 25-28: ordinal not in range(128)

I would ask the developer if I got the error as all users but since its only happening as nobody I figured Id ask here.