As a stopgap, you can consume babylon.ktx2Decoder.js from here: https://cdn.jsdelivr.net/npm/babylonjs-ktx2decoder@8.33.4/babylon.ktx2Decoder.js
As a stopgap, you can consume babylon.ktx2Decoder.js from here: https://cdn.jsdelivr.net/npm/babylonjs-ktx2decoder@8.33.4/babylon.ktx2Decoder.js