Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [    test_utf8 ...                                                       [ERROR]]: [This is a failed test but it does not seem to affect the overall outcome of the build.]
=============
[[ERROR]
Traceback (most recent call last):
  File "/builddir/build/BUILD/python-twisted-24.11.0-build/twisted-twisted-24.11.0/src/twisted/trial/runner.py", line 616, in loadPackage
    module = modinfo.load()
  File "/builddir/build/BUILD/python-twisted-24.11.0-build/twisted-twisted-24.11.0/src/twisted/python/modules.py", line 393, in load
    return self.pathEntry.pythonPath.moduleLoader(self.name)
  File "/builddir/build/BUILD/python-twisted-24.11.0-build/twisted-twisted-24.11.0/src/twisted/python/reflect.py", line 297, in namedAny
    topLevelPackage = _importAndCheckStack(trialname)
  File "/builddir/build/BUILD/python-twisted-24.11.0-build/twisted-twisted-24.11.0/src/twisted/python/reflect.py", line 238, in _importAndCheckStack
    return __import__(importName)
  File "/builddir/build/BUILD/python-twisted-24.11.0-build/twisted-twisted-24.11.0/src/twisted/conch/test/test_cftp.py", line 96, in <module>
    class ListingTests(TestCase):
  File "/builddir/build/BUILD/python-twisted-24.11.0-build/twisted-twisted-24.11.0/src/twisted/conch/test/test_cftp.py", line 212, in ListingTests
    locale.setlocale(locale.LC_ALL, currentLocale)
  File "/usr/lib64/python3.13/locale.py", line 615, in setlocale
    return _setlocale(category, locale)]: [This is a traceback of the error showing us where the error originated from and how it propagated throughout the calls.]
=============
[locale.Error: unsupported locale setting]: [The locale setting is not supported.]
=============
[[ERROR]
Traceback (most recent call last):
  File "/builddir/build/BUILD/python-twisted-24.11.0-build/twisted-twisted-24.11.0/src/twisted/trial/_synctest.py", line 1459, in _runCleanups
    f(*args, **kwargs)
  File "/usr/lib64/python3.13/locale.py", line 615, in setlocale
    return _setlocale(category, locale)
locale.Error: unsupported locale setting]: [A failure of the function _setlocale beacuse of setting an unsupported locale.]
=============
[FAILED (skips=1068, errors=2, successes=10323)
error: Bad exit status from /var/tmp/rpm-tmp.E2gVCY (%check)
    Bad exit status from /var/tmp/rpm-tmp.E2gVCY (%check)]: [The build failed during the %check part of the build.]

Issue: The build failed because of inputting an unsupported locale into the _setlocale() function during the %check part of the build.
Resolution: Check if the test mentioned in the traceback is setting the correct locale and check if the _setlocale() function checks for a valid locale properly.