Thanks for the comments. Are you talking about the problem in this link (https://stackoverflow.com/questions/66868221/gensim-3-8-0-to-gensim-4-0-0)? I have updated mol2vec/features.py from model.wv.vocab.keys to model.wv.index_to_key. My environment now is mol2vec 0.1 and gensim 3.8.3.
