So, I'm having an issue using custom shaders in my project. I have tried using both the Real Toon Shader package and the Amplify Shader package, but both give me the same result: Whenever I'm in a match and a character using these custom shaders is attacked, the attacking player freezes in place, and the game is softlocked. In the error message, I receive the following message for each material that uses the shader:
Material "X"(Instance) with shader "Y" doesn't have a color property "_Color"

I've tried many solutions to try and fix this and have had no success. I found a thread here with a person who had a similar issue, but I'm not sure I understand how they resolved their problem. Would anyone be able to help please?