Werkzeug Internal Server Error

traceback.txt

Traceback (most recent call last):
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/contrib/staticfiles/handlers.py", line 63, in __call__
    return self.application(environ, start_response)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/whitenoise/base.py", line 119, in __call__
    return self.application(environ, start_response)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/core/handlers/wsgi.py", line 189, in __call__
    response = self.get_response(request)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/core/handlers/base.py", line 218, in get_response
    response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/core/handlers/base.py", line 261, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django_extensions/management/technical_response.py", line 5, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/six.py", line 659, in reraise
    raise value
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/Cellar/python3/3.4.3/Frameworks/Python.framework/Versions/3.4/lib/python3.4/contextlib.py", line 30, in inner
    return func(*args, **kwds)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/contrib/auth/decorators.py", line 22, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/views/generic/base.py", line 89, in dispatch
    return handler(request, *args, **kwargs)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django/views/generic/list.py", line 175, in get
    return self.render_to_response(context)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django_tables2_reports/views.py", line 42, in render_to_response
    return create_report_http_response(self.table_to_report, self.request)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django_tables2_reports/utils.py", line 37, in create_report_http_response
    response = table.treatement_to_response(response, report_format=report_format)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django_tables2_reports/tables.py", line 146, in treatement_to_response
    title_sheet=self.param_report[:csv_to_xls.MAX_LENGTH_TITLE_SHEET])
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django_tables2_reports/csv_to_xls/__init__.py", line 39, in convert
    csv_kwargs=csv_kwargs)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django_tables2_reports/csv_to_xls/openpyxl_converter.py", line 39, in convert
    write_row(ws, lno, line, cell_widths, encoding=encoding)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/django_tables2_reports/csv_to_xls/openpyxl_converter.py", line 55, in write_row
    ws.cell(column=cno, row=lno).value = cell_text
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/openpyxl/worksheet/worksheet.py", line 350, in cell
    column = get_column_letter(column)
  File "/Volumes/iMac/Users/paridin/.virtualenvs/pyppm/lib/python3.4/site-packages/openpyxl/utils/__init__.py", line 100, in get_column_letter
    raise ValueError("Invalid column index {0}".format(idx))
ValueError: Invalid column index 0