{seller.supports[index].description}

vue.esm.js?efeb:576 [Vue warn]: Property or method "index" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.

found in

---> <VHeader> at src/components/header/header.vue

       <App> at src/App.vue

         <Root>