Facing issue with CompositionToStructureFromMP

I just made small script(attached below) to see the output of ‘CompositionToStructureFromMP’, but I am getting following error:/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/multiprocessing/resource_tracker.py:224: UserWarning: resource_tracker: There appear to be 1 leaked semaphore objects to clean up at shutdown
warnings.warn('resource_tracker: There appear to be %d ’

Can someone help me figure out the problem?

from matminer.datasets import load_dataset
from matminer.featurizers.conversions import StrToComposition, CompositionToStructureFromMP

def test_composition_to_structure():
df = load_dataset(“mp_nostruct_20181018”)

df = df.head(10)

stc = StrToComposition()
df = stc.featurize_dataframe(df, "formula")

cts = CompositionToStructureFromMP()
    df = cts.featurize_dataframe(df, "composition", ignore_errors=True)
    print(df[['composition', 'structure']])
except Exception as e:
    print(f"Error occurred: {e}")

if name == “main”: