Spending will doesn't seem to be working properly. When I click the button 99% of the time nothing happens. I've tried this on 3 different browsers now with the same issue.
Actually it's the same issue if i try to spend on any other upgrade too. Only button that works consistently is the "Tap here" one. :(
Edit: verson 1.2 seems to be working fine for me though. 1.2.1 is the one I'm having issues with