Brown tiles when post process effect is enabled on mobile

I’m creating a game for android. I’ve downloaded the Chameleon Post-Process asset from the marketplace and I’ve added it to my game. In the editor it works fine but when I play it on my android phone I get brown tiles when the post process effect is enabled(see picture).

What does this mean? Is this something from Unreal Engine or is it from Chameleon? I’ve enabled Mobile HDR in the project settings. Are there some other settings I need to enable?

It means a texture that Chameleon is expecting to use for the process, is missing. Take a look at the settings for the process and check you have the texture in the right place…