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I want to get eye tracking data at all times while the Unity project is running. For example Direction: (-0.02, -0.74, -0.67) Direction: (0.00, -0.63, -0.78) Direction: (0.01, -0.58, -0.81)... What script should I write? unity version 2021.3.16f1 Eye and Facial Tracking SDK 1.3.6.8

I am using unity2021.3.16f1, imported Eye and Facial Tracking SDK 1.3.6.8 and wrote scripts. However, I get the following error in "using SRanipal;". 「Assets\アイトラッキング\EyeTrackingDataLogger.cs(3,7): error CS0246: The type or namespace name 'SRanipal' could not be found (are you missing a using directive or an assembly reference?)」 Does this mean that unity2021.3.16f1 and Eye and Facial Tracking SDK 1.3.6.8 are incompatible? Also, what version of the Eye and Facial Tracking SDK is compatible with unity2021.3.16f1?