Hi!
I just ran into this problem and was able to solve it by and adding mycert.cert and mycert.privatekey to Build/Lumin folder and editing Conig/DefualtEngine.ini
[/Script/LuminRuntimeSettings.LuminRuntimeSettings]
PackageName=com.magicleap.cubecontroller
ApplicationDisplayName=
bIsScreensApp=False
FrameTimingHint=FPS_60
bProtectedContent=False
bManualCallToAppReady=False
bUseMobileRendering=True
bUseVulkan=True
Certificate=(FilePath=“Build/Lumin/mycert.cert”)
IconModelPath=(Path=“Build/Lumin/Model”)
IconPortalPath=(Path=“Build/Lumin/Portal”)
VersionCode=1
MinimumAPILevel=6
-AppPrivileges=LowLatencyLightwear
-AppPrivileges=Internet
-AppPrivileges=LocalAreaNetwork
-AppPrivileges=GesturesSubscribe
-AppPrivileges=GesturesConfig
-AppPrivileges=CameraCapture
-AppPrivileges=WorldReconstruction
-AppPrivileges=PwFoundObjRead
-AppPrivileges=ScreensProvider
-AppPrivileges=AudioCaptureMic
-AppPrivileges=IdentityRead
-AppPrivileges=VoiceInput
-AppPrivileges=ControllerPose
+AppPrivileges=LowLatencyLightwear
+AppPrivileges=Internet
+AppPrivileges=LocalAreaNetwork
+AppPrivileges=GesturesConfig
+AppPrivileges=CameraCapture
+AppPrivileges=WorldReconstruction
+AppPrivileges=ControllerPose
+AppPrivileges=CoarseLocation
SpatializationPlugin=
ReverbPlugin=
OcclusionPlugin=
bRemoveDebugInfo=True
bFrameVignette=False
+AppPrivileges=AddressBookRead
+AppPrivileges=AddressBookWrite
+AppPrivileges=CoarseLocation
+AppPrivileges=HandMesh