I'd guess that the CDP works as usual, just hit away! If not, your L18 CC will survive a day or two without your contribution ;)
What's your installation? PC or mobile? Which browser and Flash version?
Some ideas for remedy on a PC:
- Close all(!) browser windows and re-try,
- shut down your computer and re-try.
- use a different browser for a check,
- use a different computer for a check,
- via adobe.com, uninstall Flash and re-install.
(if you're using Firefox, be sure to install V21!)