mediawiki: File LocalSettings.php is missing

Installation of mediawiki gives the following error:

Error installing application: ('mediawiki', '', 'Traceback (most recent call last):\n File "/usr/share/plinth/actions/mediawiki", line 142, in \n main()\n File "/usr/share/plinth/actions/mediawiki", line 138, in main\n subcommand_method(arguments)\n File "/usr/share/plinth/actions/mediawiki", line 74, in subcommand_setup\n _disable_public_registrations()\n File "/usr/share/plinth/actions/mediawiki", line 81, in _disable_public_registrations\n if not grep(r'\$wgGroupPermissions.*createaccount', CONF_FILE):\n File "/usr/lib/python3/dist-packages/plinth/utils.py", line 138, in grep\n line.rstrip() for line in open(file_name) if re.search(pattern, line)\nFileNotFoundError: [Errno 2] No such file or directory: '/var/lib/mediawiki/LocalSettings.php'\n')

File LocalSettings.php is missing Plinth 0.25