HaldCLUT is a specific type of LUT. You should definitely read the HaldCLUT page on RawPedia: Film Simulation - RawPedia
The cine LUTs you have are not compatible. You can get the HaldCLUT PNG and apply your cine LUT to it in light works, then use the resulting PNG in RT.
There is a combo box in the preferences where you can set the folder with all your CLUTs in it.