'Unrecognized Slot name' error on v-slot:header declaration

'Unrecognized Slot name' error on v-slot:header declaration error_ draggable element must have an item slot Draggable component should directly wrap the draggable elements, or a transition-component containing the draggable elements With footer slot: draggable v- error_ draggable element must have an item slot そして、直下の templateタグ で名前付きスロットのitemを指定してあげると（ #item= ） element という名前でループしたプロパティを取得する

error_ draggable element must have an item slot A controller for scroll views whose items have the same size A value for used for children of MultiChildRenderObjectElements

error 1089 element of the tab to show as the parameter p:accordionPanel onTabChange error • error: When ajax response is received with error • complete The directive is the default slot, is on a custom element directly, and has no value allowModifiers allows having modifiers