We've had the same issue in Finland for about 30 minutes or so.
Same thing with app.powerbi.com and mobile apps. From app.powerbi.com you can get the error message with a handicapped owl:
Something went wrong. Please try again later. TECHNICAL DETAILS An unknown error occurred. If you continue to see this error, please provide the following information when requesting support. Date and Time: 2017-12-08 08:20:47Z ActivityId: 9896ba2e-54b9-4588-a190-8b90553ca71e