Android Export, Screen Flashes From Shaders

Hey I recently ran into a issue while exporting an apk, when I play it it flashed black or pink. I think it is because of the shaders that I have used in my projects. But i do not know know how to fix the shaders so they work for android? If you want to download the whole project to look at and fix the issue with the shaders you can download it here: (The shader files are in a folder called "Shaders" and the ones that I think are causing the issue are: "SolidColour" and "TextureOnly" ): https://www.mediafire.com/?hjdt48r93q1csgt