Modular SK Components Appear as ‘None’ in Details Panel. How to Fix/View?

Since I can’t reopen the previous post, I’ll just give this one the same title.

The original post.

Same text:

Modular skeletal mesh components appear as ‘None’ in Details Panel. The materials are present.

Because of this, I cannot remove the SK component; I can only replace it.

Is this a bug? Am I missing something? How to fix? How can I see the Sk component?

This occurs in 5.5.4. It was fixed in 5.5.1. Regression.