For the newer locations, the "Begin" button only works if you click on the lower half. The next build (possibly tomorrow) will contain a fix, but in the meantime you can just click on the lower half of the button and it'll work. There is also frequently a delay after clicking on the button, but that usually only takes a few seconds at most and possibly is imperceptible on most newer machines.
The new build will also contain two new outdoor locations, at least one of which is about half a mile in diameter (the largest yet).
Here's a screenshot from one of the upcoming locations:
And something unusual in that location:
