Cannot find class 'ConveRTTokenizer'

I found out that if I use only

language: "en"

pipeline: "pretrained_embeddings_convert"

it works without errors, while if I specify the whole components:

language: "en"

pipeline:
- name: "ConveRTTokenizer"
- name: "ConveRTFeaturizer"
- name: "EmbeddingIntentClassifier"

it gives me the error that I put above. Does anybody know why is that? @Ghostvv?