Ion Refresher Content error


I have a new fresh installation based on the CLI with Vue, and with I have some problems with the ion-refresher-content options.

If I dont´t use a custom icon or custom texts it works with the default icon without texts, but if I use the properties it doesn’t work well and something crashes in the log. I upload some screenshots:

My code:

i would create a small project showing the error and submit an issue