Web app build problem local storage not working

I created a webapp using local storage and when I deployed it and I try to add records to a local storage structure it doesn’t work. I don’t know if the problem is related to the button where the logic is not working.

When I try to add records it doesn’t work even when the preview app works really well.

Another thing is that the fonts displayed in the edition in preview are different from the ones displayed in the deployed app.

I created this ticket reporting the problem but I would like to know if someone knows more about this issue.

Thank you