"IndexError: index out of range in self "While adding documents to cherche pipeline

[delmetni]

I'm using a cherche pipline built of a tfidf retriever with a sentencetransformer ranker as follows : search = (retriever + ranker) While trying to add documents to the pipeline (search.add(documents=documents), I got this error :

"""/usr/local/lib/python3.7/dist-packages/torch/nn/functional.py in embedding(input, weight, padding_idx, max_norm, norm_type, scale_grad_by_freq, sparse) 2181 # remove once script supports set_grad_enabled 2182 no_grad_embedding_renorm(weight, input, max_norm, norm_type) -> 2183 return torch.embedding(weight, input, padding_idx, scale_grad_by_freq, sparse) 2184 2185

IndexError: index out of range in self"""