the Vuejs Dashboard - calendar - mouse over event is throwing an error

the Vuejs Dashboard - calendar - mouse over event is throwing this error:

[Vue warn]: Unknown custom element: v-popover-row - did you register the component correctly? For recursive components, make sure to provide the "name" option.

found in

---> at src/pages/Visits/components/Calendar/Calendar.vue at src/components/Widget/Widget.vue at src/pages/Dashboard/Dashboard.vue at src/components/Layout/Layout.vue at src/App.vue

v-popover-row is unknown