DEBUG runtime error

Exception thrown at 0x00007FF81E574F69 (KernelBase.dll) in d.exe: WinRT originate error - 0x80040155 : ‘Failed to find proxy registration for IID: {EA1EA136-19DF-11D7-A6D2-00065B84435C}.’.

on line:
sdl2_window = SDL_CreateWindow( “blah”, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED w, h, flags );

only happens in debug builds in MSVC 2019.
only started happening after doing nothing new/different.