Error message: UV map 0 must be named UVMap. Found <name> instead.
Description
The UV map found in channel 0 is not named UVMap.
When merging objects in Blender, UV maps are merged based on their name. UVMap is the default name in Blender for the UV map in channel 0. If UV maps are named differently, this can lead to unexpected results, for example, when generating a texture atlas for the avatar.
