ParseError: mismatched tag: line NNN, column CC - in VIEW TICKETS action

[trac@…]

How to Reproduce

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

I've created a Custom query and entered following text into the query Description field:

- 6.3.2a [[TicketQuery(milestone=6.3.2a, progress)]]  

The TicketQuery macro works in the preview mode but the list of Available Reports or View Tickets action crashes.

Request parameters:

{}

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36

System Information

Trac	1.3.2
Babel	2.6.0
Genshi	0.7 (without speedups)
Jinja2	2.10
pysqlite	2.6.0
Python	2.7.15 (v2.7.15:ca079a3ea3, Apr 30 2018, 16:30:26) [MSC v.1500 64 bit (AMD64)]
pytz	2018.4
setuptools	39.2.0
SQLite	3.14.2
jQuery	1.12.4
jQuery UI	1.12.1
jQuery Timepicker	1.6.3

Enabled Plugins

timingandestimationplugin	1.5.9
traccustomfieldadmin	0.2.13
tracmastertickets	4.0.2
tracsubticketsplugin	0.5.3

Interface Customization

shared-htdocs
shared-templates
site-htdocs	malotraccloud3.jpg
site-templates

Python Traceback

Traceback (most recent call last):
  File "e:\pythonvirtual\trac13\lib\site-packages\trac\web\main.py", line 640, in _dispatch_request
    dispatcher.dispatch(req)
  File "e:\pythonvirtual\trac13\lib\site-packages\trac\web\main.py", line 263, in dispatch
    method=method)
  File "e:\pythonvirtual\trac13\lib\site-packages\trac\web\chrome.py", line 1418, in render_template
    fragment, iterable, method)
  File "e:\pythonvirtual\trac13\lib\site-packages\trac\web\chrome.py", line 1480, in _render_jinja_template
    iterable)
  File "e:\pythonvirtual\trac13\lib\site-packages\trac\web\chrome.py", line 1911, in _filter_jinja_page
    stream = XML(content)
  File "build\bdist.win-amd64\egg\genshi\input.py", line 275, in XML
    return Stream(list(XMLParser(StringIO(text))))
  File "build\bdist.win-amd64\egg\genshi\core.py", line 289, in _ensure
    for event in stream:
  File "build\bdist.win-amd64\egg\genshi\input.py", line 449, in _coalesce
    for kind, data, pos in chain(stream, [(None, None, None)]):
  File "build\bdist.win-amd64\egg\genshi\input.py", line 169, in _generate
    raise ParseError(msg, self.filename, e.lineno, e.offset)
ParseError: mismatched tag: line 2135, column 54