I've just downloaded SDK 15.2.0 on Windows 10 and it was unable to unzip the file and reported an error. I copied the file to Mac OS and got the same error.
Is this just a problem for me? I downloaded it with Chrome 71.
I downloaded it yesterday and didn't have any problems.
I just tried downloading and unpacking SDK 15.2 with the latest Chrome update and it worked. Could you try it again from here using another browser.
Thanks, Jared. I downloaded it with MS Edge and it opens with no errors. Not sure what went on there!