Hello!
In the latest version of Muxe texture, in the case of an HDRP project, the script responsible for creating a camera preview in the muse window GUI is failing so nothing will work/load, because the camera prefab named “Preview Scene Camera” used as base (in : com.unity.muse.texture@0.3.0\Runtime\Pbr\MaterialPreview\Assets\Resources\HDRP) is lacking “HD Additionnal Camera Data” component, I have resolved the issue by making Muse Texture package as local, then I was able to add the missing component which completly resolved the issue.
Thanks for the feedback @hugokostic! I passed this onto the team and we will implement a fix.