I am using Google Calendar and I would like to sync it with my iPhone. Usually, the best way to do this is via setting up a CalDAV account which I've been successfully doing for a while.
However, recently, the syncing has ceased to work. So have I subsequently deleted and re-added the account to my iPhone, but I keep on getting an error message, that the CalDAV account cannot be verified.
Does anybody have any suggestions what I can do about this? I'm absolutely certain the all the data I enter is correct.