I reworked my character (actor mixer) then exported the way I did before for UE5.
Now when importing, UE either crashes (the project I used my previous character with) or does this in a fresh project:
The same happens with a freshly loaded and exported CC4 Camila character too, so the problem might not be in my character project.
Solution:
Don’t delete the CC_Shaders folder from your UE project. 
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