Can't export mesh from ME3 mods

[mirh]

Describe the bug
Meshplorer can show the character models just fine in its viewport, but export fails.

To Reproduce
Steps to reproduce the behavior:

1. Download any ME3 mod (example)
2. Open whatever your file with a mesh inside is (e.g. BioH_Aria_00.pcc)
3. Try to export one (e.g. ASA_ARM_ARA_MDL) through umodel
4. Nothing happens

Expected behavior
Extract the actual mesh

Version information:
6.3 nightly 18/08/2023
Stable is bugged too.

Other information
Is the "direct" export even supposed to work?
Because it's nice and dandy that you don't have to rely on external tool, but "experimental" seems quite charitable if I cannot seem to find one situation (including ME1) where it works without a malformed file.