$v veulidate not work

[smajid14]

hello
how solve this error
vue.runtime.esm.js?5593:619 [Vue warn]: Property or method “$v” 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.

[dobbel]

@smajid14

this is my boot file

import Vuelidate from 'vuelidate'

export default ({ Vue }) => {
    Vue.use(Vuelidate)
}

see:
https://medium.com/@email_47764/quasar-form-validation-with-vuelidate-b3aeb3d27fc2