On two of my computers, the Zoho Docs syncing app seems to error with "Cannot connect to server.  Please try again later."  This problem has now persisted for more than 24 hours.  I have checked that this is not a problem with my network: I am able to connect to zoho docs on the web without any problems, and once in a while the app is able to sync (though it has failed to sync in the last couple of hours).