I haven't been able to upgrade aspects of my house for a while now.  

When I click the upgrade button, it shows the title's: Cost & Benefit but with empty parameters

And when I still go ahead to click the upgrade button, it redirects me to a blank page with the error message: Cannot POST /Property

I believe this has now been fixed, but please feed back if that's not the case

Yeah it has, Thanks Diablo 🙂.