Incomplete zip files.

[fozziethebeat]

I downloaded the paper components and received the following error on my Macbook Air when trying to unzip the archive. This looks like a previous error reported where Bower ran out of disk space when generating the zip file.

End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of archive.zip or
archive.zip.zip, and cannot find archive.zip.ZIP, period.

[ebidel]

All the VM backends went down for some reason. That's not supposed to EVER happen. Investigating....

[ebidel]

We're back up. Got some help from the App engine team. Turns out they had a bad push yesterday that affected this service.

[ankitparasher]

I am still experiencing this issue on https://www.polymer-project.org/docs/start/usingelements.html
On Chrome

[hzacchi]

This is happening for me too.

[hzacchi]

Ah, I get it!
You first need to select the element that you want, then click 'star' icon. Once you've selected all your elements, click the Star icon at the top left of the page. Than you'll download all the components you've selected at once.

I was being stupid, but the functionality isn't the most straightforward.