The original mesh has 2 mesh groups: 's4studio_mesh_1', cut number '0000' 's4studio_mesh_2', cut number '0001'
Your mesh only have 1 mesh group: 's4studio_mesh_1', cut number '0000'
You need to make sure your mesh has the exact same amount of mesh groups as the original EA mesh. And also make sure each of your mesh group has the same cut number as the mesh groups of the original mesh. Nothing less. Otherwise your mesh won't show up correctly.
Export the EA mesh and append s4studio_mesh_2 into your mesh should fix it.
I did as you said (Export the EA mesh and append s4studio_mesh_2 into your mesh should fix it.), but it still does not load
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