Lemmatizer: Connection refused

[bnika]

Tagging works fine both using the pos module and the cli. But the lemmatizer fails in both cases

pos lemma example.txt example_lemmatized.txt

Is not able to find the "lemma" model, returns ConnectionRefusedError: [Errno 61] Connection refused
When running the lemmatizer from within the pos module, the following error occurs:

ValueError: tuple.index(x): x not in tuple

For Fields.Lemmas, not found in dataset.

Any ideas on what I might be missing or what the problem might be?