We're aware that the Settings page (accessed via the Settings link from your user icon on desktop or in the mobile drawer) is not working at the moment. We're working on a fix.
As a workaround, you can visit your My Boards page (if you have any saved boards), or go straight to your Notifications page if so desired by using the following url and filling in your user ID:
We'll update this thread when a fix has been released. Sorry for the inconvenience.