VR Expansion Plugin

I have the vrep example proj working fine, and it compiles and runs on quest.
But, as I said, I want to avoid the c++ compiling

I read the migrating tips.
I don’t understand fully the grip instructions
so anyway
I spent about 6 hours migrating it and compiling
I made a blank vr template UE proj, copied the advanced and vrep binaries, migrated the vrep example, copied the config and vive folders to content, made the motioncontroller map default and get 4 critical errors like :

UATHelper: Packaging (Android (ASTC)): LogInit: Display: Warning/Error Summary (Unique only)
UATHelper: Packaging (Android (ASTC)): LogInit: Display: -----------------------------------
UATHelper: Packaging (Android (ASTC)): LogInit: Display: LogBlueprint: Error: [AssetLog] C:\Unreal\Projects\questvrep\Content\VRExpansion\Vive\Testing\GraspingHand\GraspingHand.uasset: [Compiler] Create Event : unable to determine expected signature - is the delegate pin connected? from Source: /Game/VRExpansion/Vive/Testing/GraspingHand/GraspingHand.Gras
pingHand
UATHelper: Packaging (Android (ASTC)): LogInit: Display: LogBlueprint: Error: [AssetLog] C:\Unreal\Projects\questvrep\Content\VRExpansion\Vive\Testing\GraspingHand\GraspingHand.uasset: [Compiler] Could not find an event-dispatcher named “OnSocketingObject” in ‘GripMotionControllerComponent’.
UATHelper: Packaging (Android (ASTC)): Make sure ‘GripMotionControllerComponent’ has been compiled for Bind Event to OnSocketingObject from Source: /Game/VRExpansion/Vive/Testing/GraspingHand/GraspingHand.GraspingHand
UATHelper: Packaging (Android (ASTC)): LogInit: Display: LogBlueprint: Error: [AssetLog] C:\Unreal\Projects\questvrep\Content\VRExpansion\Vive\Testing\GraspingHand\GraspingHand.uasset: [Compiler] Failed to create property K2Node_CreateDelegate_OutputDelegate_10 from due to a bad or unknown type (Delegate) from Source: /Game/VRExpansion/Vive/Testin
g/GraspingHand/GraspingHand.GraspingHand
UATHelper: Packaging (Android (ASTC)): LogInit: Display: LogBlueprint: Error: [AssetLog] C:\Unreal\Projects\questvrep\Content\VRExpansion\Vive\Testing\GraspingHand\GraspingHand.uasset: [Compiler] Create Event Signature Error: Unable to determine expected signature - is the delegate pin connected? from Source: /Game/VRExpansion/Vive/Testing/GraspingHand/Gr
aspingHand.GraspingHand
UATHelper: Packaging (Android (ASTC)): LogInit: Display: LogMaterial: Warning: [AssetLog] C:\Unreal\Projects\questvrep\Content\VRExpansion\Vive\Testing\Camera\CameraScreenMat.uasset: Failed to compile Material for platform SF_VULKAN_ES31_ANDROID, Default Material will be used in game.
UATHelper: Packaging (Android (ASTC)): LogInit: Display: LogMaterial: Warning: Cooking a material resource (in CameraScreenMat hierarchy) that doesn’t have a valid ShaderMap! Shadermap pointer is null.
UATHelper: Packaging (Android (ASTC)): LogInit: Display:
UATHelper: Packaging (Android (ASTC)): LogInit: Display: Failure - 4 error(s), 2 warning(s)
UATHelper: Packaging (Android (ASTC)): LogInit: Display:
UATHelper: Packaging (Android (ASTC)):
UATHelper: Packaging (Android (ASTC)): Execution of commandlet took: 342.88 seconds
UATHelper: Packaging (Android (ASTC)): LogShaderCompilers: Display: === FShaderJobCache stats ===
UATHelper: Packaging (Android (ASTC)): LogShaderCompilers: Display: Total job queries 165, among them cache hits 0 (0.00%)
UATHelper: Packaging (Android (ASTC)): LogShaderCompilers: Display: Tracking 165 distinct input hashes that result in 13 distinct outputs (7.88%)
UATHelper: Packaging (Android (ASTC)): LogShaderCompilers: Display: RAM used: 0.38 MB (0.00 GB) of 1228.80 MB (1.20 GB) budget. Usage: 0.03%
UATHelper: Packaging (Android (ASTC)): LogShaderCompilers: Display: ================================================
UATHelper: Packaging (Android (ASTC)): LogHttp: Display: cleaning up 0 outstanding Http requests.
UATHelper: Packaging (Android (ASTC)): LogContentStreaming: Display: There are 1 unreleased StreamingManagers
UATHelper: Packaging (Android (ASTC)): Took 397.4479968s to run UE4Editor-Cmd.exe, ExitCode=1
UATHelper: Packaging (Android (ASTC)): ERROR: Cook failed.
UATHelper: Packaging (Android (ASTC)): (see C:\Users\OEM\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Unreal+UE_4.27\Log.txt for full exception trace)
UATHelper: Packaging (Android (ASTC)): AutomationTool exiting with ExitCode=25 (Error_UnknownCookFailure)
UATHelper: Packaging (Android (ASTC)): BUILD FAILED
PackagingResults: Error: Unknown Cook Failure

I’m just bashing at it, I do not code c++ and have only been using Unreal a year and a half.