Model incorrectly showing without texture (possible shader issue?)

[Frostshake]

Reported on WMV discord:

• Cfx_priest_voidform_tentacle.m2 showing as white
• working here: https://old.wow.tools/mv/?buildconfig=0753384ca2f3e158f9f528c227f90d23&cdnconfig=074122ed9d63bb66f1127547b80a8819&filedataid=1689811&type=m2
• texture also listed with wow.export