After full rebuild:
...

/home/ssg/.local/soft/bb-worker/worker/upp/build/reference/ScatterDraw_Demo/ScatterDraw_Demo.cpp:16:2: error: reference to 'Vector' is ambiguous
        Vector<Pointf> s1;
        ^
/home/ssg/.local/soft/bb-worker/worker/upp/build/uppsrc/Core/Vcont.h:104:7: note: candidate found by name lookup is 'Upp::Vector'
class Vector : public MoveableAndDeepCopyOption< Vector<T> > {
      ^
/home/ssg/.local/soft/bb-worker/worker/upp/build/uppsrc/plugin/Eigen/Eigen/src/Core/Matrix.h:549:1: note: candidate found by name lookup is 'Eigen::Vector'
using Vector = Matrix<Type, Size, 1>;
^
1 error generated.
...

It is still broken ...