Could not find a version that satisfies the requirement llama-index-finetuning-cross-encoders

Question

I'm trying to run this Llama Index How to Finetune a cross-encoder using LLamaIndex. And, I cannot install llama-index-finetuning-cross-encoders package.

I tried this code

%pip install llama-index-finetuning-cross-encoders

And, I cannot install llama-index-finetuning-cross-encoders package with this Error comment.

ERROR: Could not find a version that satisfies the requirement llama-index-finetuning-cross-encoders (from versions: none)
ERROR: No matching distribution found for llama-index-finetuning-cross-encoders

How can I install this package? :)