nDisplay Built application showing Blackscreens

Hello together,
we are currently developing an nDisplay Application using Unreal 5.3.
Whenever I try to build the application it works fine but as soon as I start the application via nDisplay it will only render a black screen. What is strange about it is that is renders ui just fine. The sound of the application can be heart aswell.

A frind of mine is building the very same application (we share it via git) and building and running via nDisplay works out just fine.

We dont use custom Meshes for nDisplay and running it from the editor via nDisplay works fine aswell. We also compared a lot of drivers (Nvidia, Visual Studio, MSVC etc.).

At this point we dont know any further so I wanted to ask if someone can and may help us?

Kind regards, Lucas

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Did you fix the error? I have similar problems in UE5.4 and UE5.5. And the most wired thing is it was totally worked well before. Now, UE5.4 is black screen, UE5.5 has some broken parts. I have printed out the location, the nDisplay cluster is attached to the player.

Here are ue5.5 screenshots.