Hello Makiko,
Yes, we’re aware of this problem and working on it.
If you open CODAP from the Launch CODAP link on the page and then open Getting Started with CODAP example document, you’ll see that we have removed the first step until we can fix the problem.
Thanks for pointing out that the link on that page opens a version with the step that cannot be accomplished on Windows with Chrome.
By the way, the problem does not occur with other browsers or on the Mac.
Hopefully we’ll be able to fix this soon.
Bill