Impossible de lancer la session de mon projet UEFN

Summary

Impossible de lancer la session uniquement sur le projet snipxdfsa. Les Verse et la validation réussissent, mais Valkyrie affiche « Failed to load source files ». Un projet vide se lance correctement.

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

  1. Open the UEFN project “snipxdfsa”.
  2. Open the main level.
  3. Click Launch Session.
  4. Wait for the launch process to complete.
  5. UEFN displays: “Unable to play: Failed to load source files”.
  6. A new blank UEFN project launches successfully on the same PC and account.

Expected Result

The session should launch successfully and load the current UEFN project.

Observed Result

Verse compilation and local project validation complete successfully, but the session does not start. UEFN displays “Failed to load source files”. The Output Log only shows “LogValkyrie: Unable to play: Failed to load source files” without identifying a specific asset or file.

Platform(s)

windows

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The error at the bottom of log show

LogAutomationController: Ignoring very large delta of 8.61 seconds in calls to FAutomation
ogD3D12RHI: Swap chain created with frame-latency waitable object, maximum frame latency


the problem is DX12 change to DX11 to see if this fixes the problem