UnicodeError: source returned bytes, but no encoding specified

[porqpynz@…]

How to Reproduce

While doing a GET operation on /roadmap , Trac issued an internal error.

please provide additional details here

Request parameters: {} User agent: Mozilla/5.0 Windows NT 6.1; WOW64; rv:41.0 Gecko/20100101 Firefox/41.0

System Information

Trac	1.0.1
Babel	0.9.4
FullBlog	0.1.4
Genshi	0.7 without speedups
mod_python	3.3.1
Pygments	1.1.1
pysqlite	2.4.1
Python	2.6.6 r266:84292, Nov 21 2013, 10:50:32 br GCC 4.4.7 20120313 Red Hat 4.4.7-4
pytz	2010h
RPC	1.1.2
setuptools	0.6
SQLite	3.6.20
Subversion	1.6.11 r934486
JQUERY	1.7.2

Enabled Plugins

SimpleMultiProject	0.5.1dev
TicketImport	0.8.3
TracAccountManager	0.4.4
TracCustomFieldAdmin	0.2.12
TracDateField	3.0.0
TracFullBlogPlugin	0.1.4
TracReposReadMePlugin	0.1
TracSubTicketsPlugin	0.2.0.dev-20131112
TracXMLRPC	1.1.2

Python Traceback

Traceback  most recent call last :
File  /usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/web/main.py,
line 497, in _dispatch_request  dispatcher.dispatch req
File  /usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/web/main.py,
line 233, in dispatch  content_type
File  /usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/web/chrome.py,
line 983, in render_template  stream |  self._filter_stream req, method, fileNAME, stream, data
File  /usr/lib64/python2.6/site-packages/Genshi-0.7-py2.6-linux-x86_64.egg/genshi/core.py,
line 133, in __or__  return Stream _ensure FUNCTION self  , serializer self.serializer
File  /usr/lib/python2.6/site-packages/Trac-1.0.1-py2.6.egg/trac/web/chrome.py,
line 1162, in inner  data
File  build/bdist.linux-x86_64/egg/simplemultiproject/roadmap.py,
line 113, in filter_stream  stream   stream | filter_.replace HTML   label for  showcompleted >Show completed milestones and
File  /usr/lib64/python2.6/site-packages/Genshi-0.7-py2.6-linux-x86_64.egg/genshi/input.py,
line 442, in HTML  return Stream list HTMLParser BytesIO text , encoding encoding
File  /usr/lib64/python2.6/site-packages/Genshi-0.7-py2.6-linux-x86_64.egg/genshi/core.py,
line 273, in _ensure  event   stream.next
File  /usr/lib64/python2.6/site-packages/Genshi-0.7-py2.6-linux-x86_64.egg/genshi/input.py,
line 449, in _coalesce  for kind, data, pos in chain stream,   None, None, None   :
File  /usr/lib64/python2.6/site-packages/Genshi-0.7-py2.6-linux-x86_64.egg/genshi/input.py,
line 337, in _generate  raise UnicodeError  source returned bytes, but no encoding specified
UnicodeError: source returned bytes, but no encoding specified