[Vuejs]-Failed to mount component: template or render function not defined while using in another components in Vuejs

The component looks correct to me. Your issue is likely related to the build of Vue you have. If you only have the runtime build of Vue you will not be able to use the single-file components, so you’ll need to use the full build of Vue. https://v2.vuejs.org/v2/guide/installation.html#Runtime-Compiler-vs-Runtime-only