vue.runtime.esm.js?2b0e:587 [Vue warn]: Error in created hook: "ReferenceError: play$ is not defined"

found in

---> <Hide> at src/views/Hide.vue
       <App> at src/App.vue
         <Root>
vue.runtime.esm.js?2b0e:587 [Vue warn]: Property or method "energy$" 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

---> <Hide> at src/views/Hide.vue
       <App> at src/App.vue
         <Root>