Problem with cltk_nlp.analyze() - Wont' read str

Question

I am testing the Classical Language Toolkit "Demonstration", under the header "Run NLP pipeline with NLP()"

I run it in spyder on python 3.9.18.

I get this problem. It says that the string is "none". Is it a problem with the Stanza nlp or is it something else?

cltk_doc = cltk_nlp.analyze(text=luke10Tokens) Traceback (most recent call last):

Cell In[15], line 1 cltk_doc = cltk_nlp.analyze(text=luke10Tokens)

doc = a_process.run(doc)

cltk_words = self.stanza_to_cltk_word_type(stanza_doc)

pos: Optional[MorphosyntacticFeature] = from_ud("POS", stanza_word.pos)

values = feature_value.split(",")

AttributeError: 'NoneType' object has no attribute 'split'

I hope you can help me further :-) best regards

I have double-checked the input text and I have checked the CLTK version. I'm stuck so far.