I'm having an issue with Solve Tangents. Your example scene is working fine, but when I apply Solve Tangents to my own sprite I have issues. If I override the sprite's motion with SkeletonUtility, the tangents appear to solve. But if I run an animation, the tangents appear static.
See the following image for details. I am debugging worldNormals to show the issue. The attached issue is in my homebrewed shader, but the same issue appears if I try to apply your out-of-the-box shaders.