I've checked the reports, and the textures weren't compatible since the materials were different from the beta models.
Now it's been reworked and fixed!

From 2 textures, we passed to 5 textures!

2 for inklings, 2 for octolings, and 1 for the rival octoling!

NOTE:
The male octoling will have a bumpmap glitch on the eyelids when the texture is applied,
so add the string attribute "$bumpmap" and paste "models\props_splatoon2\inktoling_bumpmap.vtf" to fix it!

Enjoy!