Issue with Fine-Tuning BERT-based Model: "You can't train this retriever"

[Chetan-Yeola]

I encountered an issue while attempting to fine-tune a BERT-based model in Haystack. The error message I received is as follows:
You can't train this retriever. You can only use the train method with sentence-transformers EmbeddingRetrievers.

[anakin87]

Hello...

The error seems fairly self-explanatory, but please provide the code you used so we can better help you.