BUG: Unhandled error in plugin metainfo_movie: 'NoneType' object has no attribute 'split' #2214

Expected behaviour:

All the movies from a letterboxd list are mirrored on a trakt list.

Actual behaviour:

Some movies are fetched from the letterboxd list and then an error occour.

Steps to reproduce:

Simply run the task a few times

Config:

The full congif is here: https://github.com/effemmeffe/flexget/blob/master/config.yml

The task that fails is this:

  letterboxd-to-trakt:
    disable: seen
    letterboxd:
      username: "{? letterboxd.user ?}"
      list: $LETTERBOXD-LIST
    sort_by: added
    accept_all: yes
    list_add:
      - trakt_list:
          account: "{? trakt.account ?}"
          username: "{? trakt.user ?}"
          list: $TRAKT-LIST

Log:

https://pastebin.com/hbwHdP4i

Additional information:

• FlexGet version:
  2.14.25

• Python version:
  Python 2.7.15rc1

• Installation method:
  pip

• Using daemon (yes/no):
  yes

• OS and version:
  Ubuntu 18.04.1 LTS

• Link to crash log:
  https://pastebin.com/hbwHdP4i