TLDW for the solution shown here: https://www.youtube.com/watch?v=3TFTTgXSBRU
(which resolves some ambiguities in the posted solutions)
Open: C:\Program Files\Epic Games\UE_5.5\Engine\Plugins\Marketplace\MetaHuman_5.5\MetaHuman.uplugin
(Or the equivalent for your UE5.5 install)
Find:
{
“Name”: “MetaHumanIdentityEditor”,
“Type”: “Runtime”,
“LoadingPhase”: “Default”,
“PlatformAllowList”: [
“Win64”
]
}
Change “Runtime” to “Editor”