Texture problem at instantiation


I’m dealing with a texture problem. I mount a .pak file in which there is a 3D model and a texture that I ‘cook’ before with the UE4 editor for windows (WindowsNoEditor and Windows). Then I instantiate my BP player and I change the mesh and pass the texture to it.
This manipulation works well on the editor but doesn’t work once the application is compiled for windows…

I didn’t found any information about this, maybe someone here would have a solution?

All my .pak creation is made with Python + UE4

Another information is that when the model is instantiated, once the texture is put to it, I can see that it is good 1ms and then it goes to black and yellow.

Left image: Editor

Right image: Windows build