Game mechanic works in Editor but not in Build

I’ve added a feature to my game which allows the player to change the design of the player character in a ‘Change Skin’ menu by clicking one of 5 icons. While this feature works perfectly in the editor, when I built the game, it just stopped working completely as the player character’s skin could not be changed at all. I honestly have no idea why this is as this has never happened with any other parts of the game. Any help with this is appreciated. Thank you.

at a guess…check that you are not using any editor-only features… for example make sure you are not loading your custom skins using editor-only load functions such as AssetDatabase.LoadAssetAtPath(). instead of that, use Resources.load