I disabled Houdini plugin in project but still get:

PackagingResults: Error: DoesPackageExist: DoesPackageExist FAILED: ‘/HoudiniEngine/houdini_default_material’ is not a standard unreal filename or a long path name. Reason: Path does not start with a valid root. Path must begin with: ‘/Engine/’, ‘/Game/’, ‘/Paper2D/’, ‘/CryptoKeys/’, ‘/MeshEditor/’, ‘/DatasmithContent/’, ‘/MagicLeap/’, ‘/MagicLeapEmulator/’,
‘/AutoSettings/’, ‘/LowEntryExtStdLib/’, ‘/PivotTool/’, ‘/PrefabTool/’, ‘/MediaCompositing/’, ‘/OculusVR/’, ‘/SteamVR/’, ‘/UnrealEnginePython/’, ‘/RepublicCommons/’, ‘/Config/’, ‘/Script/’, ‘/Memory/’, or ‘/Temp/’

Cant find what is referencing it to remove :-(

I thought I had baked all hdas in the packaged map…and still got error.
Deleted plugin entirely… and still got error…

But it's working now - I think I was inadvertently packaging all maps (some other maps still had hdas referenced)