Problem with sync from pouchDB

console.text

vue.runtime.esm.js?5593:619 [Vue warn]: Error in v-on handler: "TypeError: target.once is not a function"

found in

---> <QBtn>
       <PouchDBExample>
         <QPageContainer>
           <QLayout>
             <StorybookLayout> at src/layouts/Storybook.vue
               <App> at src/App.vue
                 <Root>
warn @ vue.runtime.esm.js?5593:619
logError @ vue.runtime.esm.js?5593:1884
globalHandleError @ vue.runtime.esm.js?5593:1879
handleError @ vue.runtime.esm.js?5593:1839
invokeWithErrorHandling @ vue.runtime.esm.js?5593:1862
invoker @ vue.runtime.esm.js?5593:2179
invokeWithErrorHandling @ vue.runtime.esm.js?5593:1854
Vue.$emit @ vue.runtime.esm.js?5593:3888
click @ QBtn.js?9c40:150
invokeWithErrorHandling @ vue.runtime.esm.js?5593:1854
invoker @ vue.runtime.esm.js?5593:2179
original._wrapper @ vue.runtime.esm.js?5593:6917
vue.runtime.esm.js?5593:1888 TypeError: target.once is not a function
    at Replication.ready (index-browser.es.js?db2f:9982)
    at replicate (index-browser.es.js?db2f:9492)
    at Function.replicateWrapper [as replicate] (index-browser.es.js?db2f:10023)
    at Object.to (index-browser.es.js?db2f:10249)
    at VueComponent.sync (pouchdb.vue?9bc3:67)
    at invokeWithErrorHandling (vue.runtime.esm.js?5593:1854)
    at VueComponent.invoker (vue.runtime.esm.js?5593:2179)
    at invokeWithErrorHandling (vue.runtime.esm.js?5593:1854)
    at VueComponent.Vue.$emit (vue.runtime.esm.js?5593:3888)
    at VueComponent.click (QBtn.js?9c40:150)
logError @ vue.runtime.esm.js?5593:1888
globalHandleError @ vue.runtime.esm.js?5593:1879
handleError @ vue.runtime.esm.js?5593:1839
invokeWithErrorHandling @ vue.runtime.esm.js?5593:1862
invoker @ vue.runtime.esm.js?5593:2179
invokeWithErrorHandling @ vue.runtime.esm.js?5593:1854
Vue.$emit @ vue.runtime.esm.js?5593:3888
click @ QBtn.js?9c40:150
invokeWithErrorHandling @ vue.runtime.esm.js?5593:1854
invoker @ vue.runtime.esm.js?5593:2179
original._wrapper @ vue.runtime.esm.js?5593:6917