I had the same problem. My code works, but the slider pulls down before I can click it. I have cleared my browser cache, I have refreshed the page, cleared and retyped the code. Nothing works. It will not let me proceed even though the code is:
The error is:
Oops, try again.
Please follow the instructions on the Full Preview page to test your code.
Well, the Preview page will not allow me to click the pull-down, so what can I do?