ReferenceError: $additionalScopeValidator is not defined

[Pavi]

<validator name="additionalScopeValidator"> <div class="ui inverted form"> <div class="ui error message" :class="!$additionalScopeValidator.valid ? 'visible' : null" v-cloak> <ul class="list"> <li v-if="$additionalScopeValidator.name.required">Attribute Name Required</li> </ul> </div>