Please perform the below mentioned steps to resolve the issue:
Swipe down the Notification pane > Select screen mirror option (Smart view / Mirroring / Miracast / Wireless Display / Mirror Share / Screencast / Screen Share / Smart View/play to ,etc) > Enable Smart view > Select the desired device > Tap to connect TV model number > Notification bar will appear on the TV screen and select Allow to give permission to connect your device > Phone is connected with TV. Now you can share the mobile content with TV.
Note: You need to have the mirroring connection to be open on both your smartphone/tablet and the TV for the mirroring to work correctly.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
