MailChimp List Drop Down Not Visible

Having an issue with the MailChimp add-on. We have the API key and MailChimp plugin activation key all set up within the plugin and following the documentation for setup, but it’s not working as expected.

The dropdown to pull in the lists from MailChimp appears blank and you cannot search for a list. When you click on the blank dropdown some of our lists appear in the selected state. However, none of the lists that show up there are the ones we set the web-hook up for. Inspecting the page it seems like there is a vue.js error:

You are running a development build of Vue.
Make sure to use the production build (*.prod.js) when deploying for production.

[Vue warn]: Property “delayed” was accessed during render but is not defined on instance.
at <TransitionGroup name=”flip-list” tag=”div” >
at <Steps>
at <App>

Not sure if that is related but it seems like it might be.