Pipeline with count and tfidf vectorizer produces TypeError: expected string or bytes-like object

Question

I have a corpus like the following \'C C C 0 0 0 X 0 1 0 0 0 0\', \'C C C 0 0 0 X 0 1 0 0 0 0\', \'C C C 0 0 0 X 0 1 0 0 0 0\', \'X X X\', \'X X X\', \'X X X\', I would lik