We are aware of issues with the submission system (PCS) for submissions of materials for Papers. We are actively working on resolving this issue. We will post regular updates on this page, as well as on Twitter, Facebook, Google+, and across all other social media channels.
Update September 19 2017 at 7am PDT, 2pm GMT, 3pm BST
We are extending the submission deadlines for Papers. Please see this blog post about updated times.
Update September 19 2017 at 5am PDT, 12pm (noon) GMT, 1pm BST
PCS is back online. We continue to monitor the situation.
If you are still experiencing issues, please restart your browser or try a different browser.
Update September 19 2017 at 4am PDT, 11am GMT, 12pm (noon) BST,
We are still working on identifying the root cause of this issue.
Next update at 6am PDT, 1pm GMT, 2pm BST, or earlier if we have any updates.
Update September 19 2017 at 9am GMT, 10am BST, 2am PDT
We are aware that PCS is currently unavailable. We are working to find the cause.
Next update at 4am PDT, 11am GMT, 12pm (noon) BST. We will post hourly updates from 9am PDT, 4pm GMT, 5pm BST