Visual studio e1696 cannot open source file

Problem with New Projects 4.20.0 - Cannot Open Source Files 0 So I just updated from 4.19.2 or something to the latest UE4 version, and when I now create a new C++ Project with "Blank Code" and add a New Class (Like an Actor) to it, Visual Studio pops out a big bunch of errors, for example:

A ball of mass m is thrown horizontally with speed v from a height h above level ground

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Why must specimens viewed with a compound microscope be thin