It seems, that using the new OSC API in C++ is not possible, since it cannot compile with MS compiler version 141 through VS and the Editor. Including a header file from the OSC Module results in a compilation error: "cannot open file "Interfaces/IPv4/IPv4Address.h": No such file or directory"
Results: Editor + Visual Studio cannot compile, because it cannot find the include file "Interfaces/IPv4/IPv4Address.h"
Expected: Project should compile, since the file is present and appears to be at the correct location.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-77906 in the post.