Hello All! So my thoughts on why the original; mesh does not work with the new BP is either the new “Hero” BP has specific references to the skeletal mesh that was imported with the package, or the Bone structure in the original mesh is different from that in the new mesh. If it was the former, I would imagine that you could probably remap the BP to a different BP fairly easily, which is probably the process that Daniel was Talking about in the Q&A (see link below for Animation Re-targeting), while if it were the latter, then it would probably be harder to change a BP to a new mesh…
Any thoughts on what I have said? Thanks!
Animation Re-targeting: https://docs.unrealengine.com/en-us/Engine/Animation/RetargetingDifferentSkeletons