Werkzeug raises BrokenFilesystemWarning
This is not a critical error, just a warning that Werkzeug couldn't detect a good locale and so is using UTF-8 instead. This guess is probably correct.
See this Arch Linux wiki article for how to set up the locale correctly. It mentions that Python may see the ANSI_X3.4-1968 encoding even if the locale is properly configured, if you are running from certain environments such as Vim.
When executing
:!python -c "import sys; print(sys.stdout.encoding)"in ViM, the output may beANSI_X3.4-1968, even if the locale is set correctly everyhere. Set thePYTHONIOENCODINGenvironment variable toutf-8to remedy the situation.
I saw this error too. After digging the code, I saw that this error is harmless and just a warning in /usr/local/lib/python2.7/dist-packages/werkzeug/filesystem.py:
warnings.warn( 'Detected a misconfigured UNIX filesystem: Will use UTF-8 as ' 'filesystem encoding instead of {0!r}'.format(rv), BrokenFilesystemWarning)So, I would not worry about this warning.