Download the latest zDEV version of UE4SS.
This version is specifically for developers and offers additional features.

Locate Cinemaster Cinema Simulator Demo's Data Folder:

Right-click on "Cinemaster Cinema Simulator Demo" in your Steam library.
Select "Manage" -> "Browse Local Files".
This will open the game's installation directory.

Install UE4SS:

Navigate to the C:\Program Files (x86)\Steam\steamapps\common\Cinemaster Cinema Simulator Demo\Cinemaster\Binaries\Win64 folder within the opened directory.
Important: Extract the downloaded zDEV UE4SS zip file directly into this folder. Do not create a subfolder for the extracted content.

Configure UE4SS (One-time setup):

Open the UE4SS-settings.ini file located in the C:\Program Files (x86)\Steam\steamapps\common\Cinemaster Cinema Simulator Demo\Cinemaster\Binaries\Win64 folder with a text editor like Notepad.
Locate the line GraphicsAPI = opengl. Change it to GraphicsAPI = dx11.
Save the changes to the UE4SS-settings.ini file.

Launch the Game and Generate Lua Types (Required after every update):

Launch Cinemaster Cinema Simulator Demo.
While the game is running, a window with multiple tabs will appear (the UE4SS interface).
Navigate to the "Dumpers" tab.
Click the button "Generate Lua Types".