I have spent a whole day and night trying to upsert vectors - i am not getting any errors now but i dont see the vectors

Code to upsert:
index = pinecone.Index(index_name=index_name)

upsert_op = index.upsert(items=embeddings)

The upsert operation has been executed successfully. The embeddings from the “embeddings.json” file have been upserted into the Pinecone index.

check returns nothing
vector_ids = list(embeddings.keys())[:5]
fetched_vectors = index.fetch(ids=vector_ids)
returns nothing

what could be going wrong?