I've observed this during the beta but thought it was a development artifact, but now that the Asset Store new version is live, it's still present. If I put one or more items in my shopping cart, then try to checkout, the Checkout Now button hangs endlessly. I've let it go for several minutes. My network connection is a 48 megabit hardwired Ethernet, and other things are running at normal speed. This is with Chrome Version 64.0.3282.119 (just updated tonight) on Windows 10 64-bit, as well as version 63.something before the update. The problem repeats for me 100% of the time on the new store, but the old store works correctly 100% of the time. The problem persists across a system reboot of my client. Is this function working for others in Chrome 64-bit on Windows?