Error when running app

When I tried to run the following command:

npm run serve

I get the following error:

ERROR in D:/Mobile/ionic/ionic-vue-conference-app-master/src/views/About.vue
61:18 Parameter 'event' implicitly has an 'any' type.
59 | export default class About extends Vue {
60 |
> 61 | presentPopover(event){
| ^
62 | console.log('click', event)
63 | }
64 | }
Version: typescript 3.0.1
Time: 17848ms

I am running this on Windows 10, with NPM version 6.9.0, vue: 3.8.2, ionic: 4.12.0

I can still access the app from localhost, so the app should still work mostly.