Unity Project settings时出现Currently selected scripting backend (IL2CPP) is not installed

Currently selected scripting backend (IL2CPP) is not installed

当前选择的脚本后端（IL2CPP）没有安装

此时单机Player Settings 在Inspector面板点击Windows图标找到Other Settings并展开，在Configuration面板中找到Scripting Backend展开，切换到.NET。