A little bug in the ParaView build setup files that is related to handling a splash screen image: in ParaViewClient.cmake(207) [referring to v5.7-RC2] I had to change this line

":/${_paraview_client_NAME}/${_paraview_client_splash_image_name}")

into this:

":/${_paraview_client_NAME}/${_paraview_client_splash_base_name}")

Without this change, the pqAPPLICATIONInitializer::Initialize() function would look for a resource named "APPLICATION_splash.img" while in reality the name of the resource would be "APPLICATION_splash" - without the “.img” extension. (Of course the fix could have been done in a way that the naming of the splash bitmap is adapted to have the extension - only it has to match!)