Error when parsing JSON: Empty strings are not legal JSON5

[Breamer]

I'm using a python AWS lambda function to run evaluations using Bedrock, with model Claude 3.5 sonnet and Uptrain version 0.7.1.

I'm getting an "Error when parsing JSON" error when trying to run evaluations, depending on the data processed.

Steps to reproduce the behavior:

Create a lambda function using python 3.11
Install uptrain
Use bedrock to run a factual accuracy evaluation

See error

ERROR | uptrain.operators.language.llm:parse_json:55 - Error when parsing JSON: Empty strings are not legal JSON5
ERROR | uptrain.operators.language.llm:async_process_payload:103 - Error when sending request to LLM API: Response doesn't pass the validation func.

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