"Moving calendars to server account" and then "Couldn't move your calendars to iCloud because an error occurred"
After following melisolaris's tips in https://discussions.apple.com/thread/5448950?answerId=23404148022#23404148022 and http://support.apple.com/kb/ht4967 to remove "Moving calendars to server account" message pane, clearing all calendar data and importing the backed up ICS, the problem seemed to go away for a while.
I went to bed, got up, open Calendar on my MacBook Pro to find the same message popped up again. It took about 30 mins for it to disappear only to be replaced by "Couldn't move your calendars to iCloud because an error occurred" message.
I am running Mavericks and I am sure my Internet connection is working fine. Does anyone have the same problem or a solution?
Thank you!
MacBook Pro, OS X Mavericks (10.9)