Error page on login

Unfortunately I'm getting an error page upon login to the Zoho planner. I've tried 3 different browsers now, so I'm assuming it's on the server's side. This is what I get :

Sorry, the page you have requested was not found.
Please check the URL for proper spelling and capitalization.
If you're having trouble locating a destination on Zoho Planner, try visiting the Zoho Planner home page.
Home Page

Does anyone else experience this?