case 1 in your asset folder, there could be a unnecessary files like (archive.zip but 'archive' in korean) that someone pushed carelessly. (maybe it is similar case that @regi9 said) remove it and try to open your project case 2 open finder right click your project file (or control click) select 'show package contents' remove 'xcshareddata' and 'xcuserdata' folders and test your project

I never thought I want to do my work desperately...