For users that have recently upgraded to 2D Animation 4.2.3, you will notice the following error:
error CS0117: 'InternalEngineBridge' does not contain a definition for 'SetBatchDeformableBufferAndLocalAABBArray'
Please hold off from upgrading to the latest 2D Animation 4.2.3. We are currently working on a fix for this. Stay tuned and we will update this post when it is available.