django filebrowser decoding

I got django filebrowser for admin, where admin can see all added files in special folder.

When admin click on folder to see whats inside, if there is some file with name who contains UNICODE chartacter, then I shows 500 error, but if not, everything is working.

We exported this webpage to new server, on old server everything where working good, but on new server we got this problem, but all website file are the same, so, I think that problem could be in some python libary files, I need some plugin or something like that to be installed, but what?

Example:
Userfiles/folder1/abcde.pdf - all working good
Userfiles/folder2/ābčdē.pdf - not working, 500 error

On log file I got this message - UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-5: ordinal not in range(128)

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