Ease and Wizz crashes when I apply 'Bounce'

This is due to a bug that in the first version of After Effects CS6 which was fixed in the free 11.0.1 upgrade. 

To fix it simply update CS6 by going to Help -> Updates... in After Effects

 

You can read the details on the Adobe blog:

• After Effects would crash when evaluating some expressions, including expressions added by the Ease & Wizz script, expressions using the this keyword, in-line functions, and nested functions.

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