Problem ! "Empty component" when export .DAE file

[Kwin]

Anyone can help please ?

I try to export .DAE model. Then I got below DAE file (4.3 KB)

MDCU Furniture Fix.dae (4.3 KB)

1. Then I import to other program, I get nothing.
2. Then I test by importing to new open SKP file. It shows error “Can’t insert empty component”

I guest problem may come from texture, so I try to use “material tool” to remove back face material but cannot fix.

There are some model can be successfully exported, but some have this problem so I would like to understand to get more predictable result.

Thank you very much.