2017-09-24 22:18 ERROR    lazy_lookup   fetch-series    Unhandled error in lazy lookup plugin
Traceback (most recent call last):
  File "c:\python27\lib\site-packages\flexget\utils\lazy_dict.py", line 37, in __getitem__
    func(self.store)
  File "c:\python27\lib\site-packages\flexget\plugins\metainfo\thetvdb_lookup.py", line 125, in lazy_series_lookup
    return self.series_lookup(entry, language, self.series_map)
  File "c:\python27\lib\site-packages\flexget\utils\database.py", line 34, in wrapper
    return func(*args, **kwargs)
  File "c:\python27\lib\site-packages\flexget\plugins\metainfo\thetvdb_lookup.py", line 117, in series_lookup
    session=session
  File "c:\python27\lib\site-packages\flexget\utils\database.py", line 31, in wrapper
    return func(*args, **kwargs)
  File "c:\python27\lib\site-packages\flexget\plugins\internal\api_tvdb.py", line 529, in lookup_series
    _update_search_strings(series, session, search=name)
  File "c:\python27\lib\site-packages\flexget\plugins\internal\api_tvdb.py", line 476, in _update_search_strings
    search.lower()] if search else []
AttributeError: 'NoneType' object has no attribute 'lower'

tasks:
  fetch-series:
    priority: 1
    disable: builtins
    trakt_list:
      username: '{? trakt.username ?}'
      account: '{? trakt.username ?}'
      list: ishows-added
      type: shows
    accept_all: yes
    thetvdb_lookup: yes
    tvmaze_lookup: yes
    set:
      title: "{{tvdb_series_name|default(tvmaze_series_name)|default(series_name)}}"
    exec:
      # auto_escape: yes
      on_start:
        phase: del %USERPROFILE%\flexget\series.txt
      on_output:
        for_entries:
          - echo "{{title}}" >> %USERPROFILE%\flexget\series.txt