The problem is that the GFur skin vertex factory cannot be found at run-time. The reason it cannot be found is because the plug-in isn’t being loaded. The plug-in isn’t loaded, because it is not whitelisted in the plug-in descriptor file. Therefor, to fix this issue, simply add “Switch” to the list of whitelisted platforms in GFur.uplugin:
"WhitelistPlatforms":
"Win64",
"Win32",
"PS4", "Switch",
"XboxOne"
]