The bootstrap-vue <b-modal> does not appear - bootstrap-vue

Question

I need to create a modal that pop-ups when the button is clicked; i tried with bootstrap-vue, following the documentation but it didn't worked.
I put in my vue project but it doesn't work. The button is there, but when i click the modal doesn't appear. When i go to the console, it says that the directive is not recognized. I will put the code and the error below
<template>
...
<c-card>
<div>
<b-button v-b-modal.exclude class="center" size="lg" variant="danger">Excluir conta</b-button>
<b-modal id="exclude" title="bootstrapVue">
<p class="my-4">Are you sure that you want to exclude your account?</p>
</b-modal>
</div>
</c-card>
</div>
</template>
<script>
import { mapState, mapActions } from 'vuex'
import cCard from '#/components/Card'
import pStatusAchievements from './_partials/StatusAchievements'
import pStatusApps from './_partials/StatusApps'
import pStatusNetwork from './_partials/StatusNetwork'
import pStatus from './_partials/Status'
import pStatusPublication from './_partials/StatusPublication'
import pMyAccount from './MyAccount'
import pPowerUp from './_partials/PowerUp'
import {BModal, VBModal} from 'bootstrap-vue'
const cContentHeader = () => import('#/components/ContentMiddleHeader')
export default {
name: 'Perfil',
components: {
cContentHeader,
cCard,
pStatusPublication,
pStatusNetwork,
pStatusApps,
pMyAccount,
pStatusAchievements,
pStatus,
pPowerUp,
BModal,
},
data () {
return {
pubStatus: 1200,
networkApps: [
{ name: 'network', title: 'rede' },
{ name: 'appsUsage', title: 'uso dos apps' }
]
}
},
directives: {
'b-modal': VBModal
},
That is the vue-warn
[Vue warn]: Unknown custom element: <b-modal> - did you register the component correctly? For recursive components, make sure to provide the "name" option.
found in
---> <Perfil> at src/views/perfil/Perfil.vue
<MFeed> at src/views/mobile/mFeed.vue
<SlideXLeftTransition>
<NavbarContent> at src/views/mobile/mContent.vue
<NavbarContent> at src/layouts/main/MainLayout.vue
<FadeTransition>
<App> at src/App.vue
<Root