Bug：控制台报错，Element type is invalid

[lucian55]

在使用的时候控制台报错，如下：

Warning: React.createElement: type should not be null, undefined, boolean, or number. It should be a string (for DOM elements) or a ReactClass (for composite components). Check the render method of `DragHandle`.

Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Check the render method of `DragHandle`.

查看了好多 issue ，发现有可能是 react 版本问题。但是我的 react 版本是 16.6.0 了，依旧报错。
请帮助我，谢谢

代码如下

<DragDropContext onDragEnd={this.onDragEnd} onDragStart={this.onDragStart} onDragUpdate={onDragUpdate}>
        <Droppable droppableId="droppable" direction={type} >
          {(provided, snapshot) => (
            <div
              ref={provided.innerRef}
              className={classnames({
                ...getClass(this.props,snapshot.isDraggingOver).drop
              })}
            >
              {this.state.items.map((item, index) => (
                <Draggable key={index} draggableId={index} index={index}>
                  {(provided, snapshot) => (
                    <div
                      ref={provided.innerRef}
                      {...provided.draggableProps}
                      {...provided.dragHandleProps}
                      className={classnames({
                        ...getClass(this.props,snapshot.isDragging).drag
                      })}
                      style={{...provided.draggableProps.style}}
                    >
                      {showKey?item[showKey]:item}
                    </div>
                  )}
                </Draggable>
              ))}
             {provided.placeholder}
            </div>
          )}
        </Droppable>
      </DragDropContext>

[TrySound]

@liushaozhen Seems like you use invalid version of react. Take a look at package.json. The version should be 16.3.1 or greater.

[alexreardon]

Thanks @TrySound.

This is such a common issue I am adding a warning to version 10 #838