Error: cannot call methods on draggable prior to initialization; attempted to call

cannot call methods on draggable prior to initialization; attempted to call  报这个问题的根本原因是由于你的引用文件有问题

，你的jquery 的js或者css样式引用反复导致它读取两次，初始化失败就会报这个错误，好好看看配置文件