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CrewAI errors / Install

AttributeError: _ARRAY_API not found; ImportError: numpy.core.multiarray failed to import

platform: CrewAI / category: Install

Cause

A transitive dependency (typically onnxruntime) was compiled against NumPy 1.x and cannot load under NumPy 2.x, which removed the legacy numpy.core namespace.

Fix

Downgrade NumPy with pip install 'numpy<2' as an immediate fix, or upgrade onnxruntime to a NumPy-2-compatible build. Check compiled deps with pip list | grep onnx and update any that predate NumPy 2 support.

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Part of the Automation Error Index — CrewAI errors: browse all.

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