[5.50b3] Cannot drag and drop sprites into Animation window

Unity Engine
1

tried to create sprite anim, by drag dropping sprites from project window to Animation window…but error comes up:

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2

Hi mgear,

We are aware of the issue and already have a fix internally. It should be available in an upcoming beta.
Issue Tracker: Unity Issue Tracker - AnimationWindow: ArgumentNullException in Curves tab

In the meantime, as a workaround, try doing another operation (eg. moving a keyframe and undoing). This will initialize the missing undo data structure and should allow you to drag&drop sprites in the animation window afterwards.

Hope this helps!

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