errors about linearVelocity

[taroutaroutaroutarou]

Describe the bug
I installed ml-agents but there are 2 errors.

ml-agents-release_22\com.unity.ml-agents.extensions\Runtime\Sensors\ArticulationBodyPoseExtractor.cs(63,36): error CS1061: 'ArticulationBody' does not contain a definition for 'linearVelocity' and no accessible extension method 'linearVelocity' accepting a first argument of type 'ArticulationBody' could be found (are you missing a using directive or an assembly reference?)

ml-agents-release_22\com.unity.ml-agents.extensions\Runtime\Sensors\RigidBodyPoseExtractor.cs(131,36): error CS1061: 'Rigidbody' does not contain a definition for 'linearVelocity' and no accessible extension method 'linearVelocity' accepting a first argument of type 'Rigidbody' could be found (are you missing a using directive or an assembly reference?)

They are about linearVelocity.
Please tell me how to solve them.

Screenshots

Environment

• Unity Version: Unity 2023.2.13f1
• OS + version: Windows 11
• ML-Agents version: ml-agents release 22
• Torch version: 2.2.2+cu121