Traceback (most recent call last):
  File "/data/project/heritage/pywikibot/pwb.py", line 263, in <module>
    if not main():
  File "/data/project/heritage/pywikibot/pwb.py", line 257, in main
    run_python_file(filename, [filename] + args, argvu, file_package)
  File "/data/project/heritage/pywikibot/pwb.py", line 121, in run_python_file
    main_mod.__dict__)
  File "/data/project/heritage/erfgoedbot/categorize_images.py", line 557, in <module>
    main()
  File "/data/project/heritage/erfgoedbot/categorize_images.py", line 547, in main
    countrycode, lang, countryconfig, commonsCatTemplates, conn, cursor)
  File "/data/project/heritage/erfgoedbot/categorize_images.py", line 427, in processCountry
    commonsCatTemplates, page, conn, cursor, harvest_type)
  File "/data/project/heritage/erfgoedbot/categorize_images.py", line 107, in categorizeImage
    replace_default_cat_with_new_categories_in_image(page, commonsCategoryBase, newcats, comment, verbose=True)
  File "/data/project/heritage/erfgoedbot/categorize_images.py", line 202, in replace_default_cat_with_new_categories_in_image
    old_categories)
  File "/data/project/heritage/erfgoedbot/categorize_images.py", line 242, in filter_out_categories_to_add
    list(candidate_categories))
  File "/data/project/heritage/erfgoedbot/categorize_images.py", line 241, in <lambda>
    final_categories = filter(lambda cat: not cat.isHiddenCategory(),
AttributeError: 'unicode' object has no attribute 'isHiddenCategory'
CRITICAL: Closing network session.
<type 'exceptions.AttributeError'>