Cannot load CRT Royal shaders on Nvidia Shield

There are some CRT shaders that will not load on the Nvidia Shield,for instance Royal. When I select one of the Royal shaders nothing happens in the next menu. Any reason for this not working?

The shield can’t run Cg shaders, only GLSL shader or, if you’re using the vulkan driver, slang shaders (which aren’t available in the online updater yet). We use a script to convert Cg shaders to GLSL but it doesn’t always work. Royale is one of those that doesn’t work, unfortunately.