Erro ao Criar Turma

Procedimento para ver o erro:

1) Clicar em uma turma já criada;
2) Através da página da turma selecionada, acessar o link: nova turma;
3) Clicar no botão de cancelar a criação da turma, o erro já vai aparecer!

Erro:

Exceção
UnicodeEncodeError: 'ascii' codec can't encode character u'\xaa' in position 51: ordinal not in range(128)

Traceback
File "/usr/lib/python2.7/dist-packages/zope/publisher/publish.py", line 132, in publish
  result = publication.callObject(request, obj)
File "/usr/lib/python2.7/dist-packages/zope/app/publication/zopepublication.py", line 205, in callObject
  return mapply(ob, request.getPositionalArguments(), request)
File "/usr/lib/python2.7/dist-packages/zope/publisher/publish.py", line 107, in mapply
  return debug_call(obj, args)
Extra information: <schooltool.skin.flourish.zcml_content.FlourishSectionAddView_addSection.html object at 0x7fb4b9a28050>
File "/usr/lib/python2.7/dist-packages/zope/publisher/publish.py", line 113, in debug_call
  return obj(*args)
File "/usr/lib/python2.7/dist-packages/schooltool/skin/flourish/page.py", line 96, in __call__
  self.update()
File "/usr/lib/python2.7/dist-packages/schooltool/course/browser/section.py", line 1333, in update
  super(SectionAddView, self).update()
File "/usr/lib/python2.7/dist-packages/z3c/form/form.py", line 211, in update
  self.actions.execute()
File "/usr/lib/python2.7/dist-packages/z3c/form/action.py", line 99, in execute
  result = handler()
File "/usr/lib/python2.7/dist-packages/z3c/form/button.py", line 315, in __call__
  return handler(self.form, self.action)
File "/usr/lib/python2.7/dist-packages/z3c/form/button.py", line 170, in __call__
  return self.func(form, action)
File "/usr/lib/python2.7/dist-packages/schooltool/course/browser/section.py", line 1410, in handle_cancel_action
  self.request.response.redirect(url)
File "/usr/lib/python2.7/dist-packages/zope/publisher/browser.py", line 759, in redirect
  return super(BrowserResponse, self).redirect(location, status, trusted)
File "/usr/lib/python2.7/dist-packages/zope/publisher/http.py", line 877, in redirect
  location = str(location)

Modules
schooltool 2.6.3 (/usr/lib/python2.7/dist-packages)

schooltool.cando 2.6.2 (/usr/lib/python2.7/dist-packages)

schooltool.gradebook 2.6.3 (/usr/lib/python2.7/dist-packages)

schooltool.intervention 2.6.2 (/usr/lib/python2.7/dist-packages)

schooltool.lyceum.journal 2.6.3 (/usr/lib/python2.7/dist-packages)

Runtime
Python 2.7.6 (default, Oct 26 2016, 20:30:19) [GCC 4.8.4]

Linux schooltool 3.13.0-111-generic #158-Ubuntu SMP Wed Feb 22 16:12:03 UTC 2017 x86_64 x86_64

Filesystem encoding ANSI_X3.4-1968, preferred ANSI_X3.4-1968