By checking the properties of the game's executable file, you will find that it uses the UE4 version 4.26.0.0. Naturally, using the same engine version as the game for Blueprint Mod development is the best choice. However, the Epic Launcher no longer offers older versions for download, only the latest 4.26.2 and 4.26 Chaos.
In fact, both of these versions can be used for Blueprint Mod development, but I strongly advise against using 4.26 Chaos. In this version, any 3D models imported from external sources, whether in .fbx or .obj format, will cause the game to crash. Strangely, it seems that Mesh in Unreal Engine project templates doesn't have this issue, but exporting and re-importing these files still leads to a crash.
It seems that part of the Chaos system is also used in the game, but the header files compile fine in the standard 4.26.2, so I may have misunderstood. For now, let's proceed as is. If I can get 4.26.0, that might be the best option.