I am getting the error "TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')" and context_recall as 0

[tvsathish]

[ ] I checked the documentation and related resources and couldn't find an answer to my question.

Your Question
Why am I getting this error "TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')" and why is my context_recall value showing up as 0.000000

Code Examples

import pprint

import pandas as pd
from langchain_openai import AzureChatOpenAI
from langchain_openai import AzureOpenAIEmbeddings
from ragas import SingleTurnSample, EvaluationDataset
from ragas import evaluate
from ragas.embeddings import LangchainEmbeddingsWrapper
from ragas.llms import LangchainLLMWrapper
from ragas.metrics import LLMContextRecall, Faithfulness, FactualCorrectness, SemanticSimilarity


def empty_nan_value(cell_value):
    return '' if pd.isna(cell_value) else cell_value


def create_turn_sample(row):
    return SingleTurnSample(
        user_input=row['user_input'],
        retrieved_contexts=[empty_nan_value(row['context1']), empty_nan_value(row['context2']),
                            empty_nan_value(row['context3']),
                            empty_nan_value(row['context4'])],
        response=row['response'],
        reference=row['reference'])


df = pd.read_excel("<RESULTS_EXCEL_FILE>")

eval_dataset = EvaluationDataset([create_turn_sample(row) for index, row in df.iterrows()])

azure_config = {
    "base_url": "<AZURE_CHAT_COMPLETIONS_URL>",
    # your endpoint
    "model_deployment": "<AZURE_DEPLOYMENT>",  # your model deployment name
    "model_name": "gpt-4o"  # your model name
}

evaluator_llm = LangchainLLMWrapper(AzureChatOpenAI(
    openai_api_version="2024-08-01-preview",
    azure_endpoint=azure_config["base_url"],
    azure_deployment=azure_config["model_deployment"],
    model=azure_config["model_name"],
    validate_base_url=False,
))

metrics = [
    LLMContextRecall(llm=evaluator_llm),
    FactualCorrectness(llm=evaluator_llm),
    Faithfulness(llm=evaluator_llm)
]
results = evaluate(dataset=eval_dataset, metrics=metrics)
pprint.pprint(results)

df = results.to_pandas()
df.head()

`
AZURE_OPENAI_KEY is environment variable

Additional context
Output:

Evaluating: 14%|████████████████████████████ | 25/174 [01:55<02:04, 1.19it/s]Exception raised in Job[31]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 23%|████████████████████████████████████████████▊ | 40/174 [02:55<03:08, 1.41s/it]Exception raised in Job[34]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 25%|█████████████████████████████████████████████████▎ | 44/174 [02:58<01:56, 1.12it/s]Exception raised in Job[37]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 30%|██████████████████████████████████████████████████████████▎ | 52/174 [03:59<06:44, 3.31s/it]Exception raised in Job[58]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 34%|██████████████████████████████████████████████████████████████████ | 59/174 [04:17<06:32, 3.41s/it]Exception raised in Job[43]: TimeoutError()
Evaluating: 35%|████████████████████████████████████████████████████████████████████▎ | 61/174 [04:59<19:02, 10.11s/it]Exception raised in Job[46]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 41%|███████████████████████████████████████████████████████████████████████████████▌ | 71/174 [05:02<02:13, 1.29s/it]Exception raised in Job[70]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 41%|████████████████████████████████████████████████████████████████████████████████▋ | 72/174 [05:03<01:46, 1.05s/it]Exception raised in Job[73]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 44%|█████████████████████████████████████████████████████████████████████████████████████▏ | 76/174 [05:44<19:13, 11.77s/it]Exception raised in Job[61]: TimeoutError()
Evaluating: 56%|█████████████████████████████████████████████████████████████████████████████████████████████████████████████▊ | 98/174 [07:04<05:08, 4.06s/it]Exception raised in Job[91]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 58%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████▌ | 101/174 [07:05<01:56, 1.59s/it]Exception raised in Job[100]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 67%|█████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▎ | 116/174 [08:06<04:46, 4.93s/it]Exception raised in Job[109]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 67%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▍ | 117/174 [08:07<03:35, 3.78s/it]Exception raised in Job[115]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 75%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████ | 131/174 [09:10<05:46, 8.06s/it]Exception raised in Job[136]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 79%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▋ | 137/174 [09:11<01:04, 1.74s/it]Exception raised in Job[142]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 80%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████ | 140/174 [09:11<00:30, 1.10it/s]Exception raised in Job[139]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 84%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▊ | 146/174 [09:27<02:06, 4.53s/it]Exception raised in Job[124]: TimeoutError()
Evaluating: 88%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▌ | 153/174 [10:13<00:58, 2.77s/it]Exception raised in Job[148]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 90%|███████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████ | 157/174 [10:14<00:16, 1.01it/s]Exception raised in Job[157]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 91%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▏ | 158/174 [10:15<00:16, 1.01s/it]Exception raised in Job[169]: TypeError(ufunc 'invert' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe'')
Evaluating: 100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 174/174 [12:19<00:00, 4.25s/it]
{'context_recall': 0.0000, 'factual_correctness': 0.1174, 'faithfulness': 0.0996}