I am also having difficulties with this template:
Steps I have taken:
I installed the "Estate" theme, and the error "Class 'NumberFormatter' not found" appeared.
I noticed that when I remove the SP Property component, the template works fine.
It also works correctly when I remove all properties.
I removed the SP Property component and reinstalled it separately, but the problem persists as soon as it is activated.
Notes:
This problem seems to be recurrent in quickstart templates that use SP Property, according to discussions in forums.