How to load a blueprint class and spawn it in C++?

I got the solution. The correct path must be ended with _C. So I have to change the path as follows:

"/Game/BP_StatueActor.BP_StatueActor_C"

Note: there is a postfix _C at the end.

Another solution (by Daniel Marshall): Just take the characters before the dot as the path:

"/Game/BP_StatueActor"

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