They have temporarily disabled their servers for maintenance. It's nothing wrong with your television.
Official Samsung notice:
To all Samsung Smart Hub users,
On Tuesday, July 2nd, the Smart Hub service will be down temporarily for scheduled maintenance. The service is scheduled to be down between 12:00 AM EST and 10:00 AM EST. We expect normal operation to resume after this time.
If Smart Hub is launched between 12:00 AM EST and 10:00 AM EST, you will receive an on-screen popup message informing you of the outage, however some users may not see a message at all, and will not be able to access Smart Hub. Rest assured, this is still part of the scheduled maintenance outage, and we expect all users to have functionality restored after 10:00 AM EST.
We thank you for your patience during this upgrade.
Samsung Online Support Team
im trying to use any apps in my samsung tv model:UN55ES7100F S/N:Z5HP3CACA02081P and it just keep giving me this error message "ERROR MODEL BIND" how can i fix this