I don’t know how much we can do about 5.5 anymore, but does using a newer ParaView work here? I don’t know if it will…the vtkSVGExporter class hasn’t changed much since then. Thoughts @utkarsh.ayachit?
Since we upgraded rendering to modern OpenGL (ParaView 5.0) we can only save to vector graphics 2D scenes stored in a vtkContext2D. You can try an earlier version of ParaView to be able to save 3D scenes to vector graphics.
See some information about this in the first item in this blog